Home / 20,760.13-28,648.47-11,328.72

Finding the Fourth Proportional to 20,760.13, 28,648.47 and 11,328.72

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Solution

The fourth proportional to 20,760.13, 28,648.47 and 11,328.72 is: 15,633.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,760.13 : 28,648.47 = 11,328.72 : x
  2. Step 2: Convert to fraction form
    20,760.13/28,648.47 = 11,328.72/x
  3. Step 3: Cross multiply
    20,760.13x = 28,648.47 × 11,328.72
  4. Step 4: Simplify right side
    20,760.13x = 324,550,495.06
  5. Step 5: Solve for x
    x = 324,550,495.06/20,760.13
  6. Step 6: Final answer
    x = 15,633.36

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Half scale
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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.