Home / 21,012.22-28,995.48-11,580.76

Finding the Fourth Proportional to 21,012.22, 28,995.48 and 11,580.76

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Solution

The fourth proportional to 21,012.22, 28,995.48 and 11,580.76 is: 15,980.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.22 : 28,995.48 = 11,580.76 : x
  2. Step 2: Convert to fraction form
    21,012.22/28,995.48 = 11,580.76/x
  3. Step 3: Cross multiply
    21,012.22x = 28,995.48 × 11,580.76
  4. Step 4: Simplify right side
    21,012.22x = 335,789,694.96
  5. Step 5: Solve for x
    x = 335,789,694.96/21,012.22
  6. Step 6: Final answer
    x = 15,980.69

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Find fourth proportional to 10,506.11, 14,497.74 and 5,790.38
Half scale
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Double scale
Find fourth proportional to 21,013.22, 28,996.86 and 11,581.76
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.