Home / 21,012.14-28,996.72-11,580.71

Finding the Fourth Proportional to 21,012.14, 28,996.72 and 11,580.71

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Solution

The fourth proportional to 21,012.14, 28,996.72 and 11,580.71 is: 15,981.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,012.14 : 28,996.72 = 11,580.71 : x
  2. Step 2: Convert to fraction form
    21,012.14/28,996.72 = 11,580.71/x
  3. Step 3: Cross multiply
    21,012.14x = 28,996.72 × 11,580.71
  4. Step 4: Simplify right side
    21,012.14x = 335,802,431.34
  5. Step 5: Solve for x
    x = 335,802,431.34/21,012.14
  6. Step 6: Final answer
    x = 15,981.35

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Double scale
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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.