Home / 20,963.28-28,929.02-11,402.96

Finding the Fourth Proportional to 20,963.28, 28,929.02 and 11,402.96

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Solution

The fourth proportional to 20,963.28, 28,929.02 and 11,402.96 is: 15,735.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.28 : 28,929.02 = 11,402.96 : x
  2. Step 2: Convert to fraction form
    20,963.28/28,929.02 = 11,402.96/x
  3. Step 3: Cross multiply
    20,963.28x = 28,929.02 × 11,402.96
  4. Step 4: Simplify right side
    20,963.28x = 329,876,457.90
  5. Step 5: Solve for x
    x = 329,876,457.90/20,963.28
  6. Step 6: Final answer
    x = 15,735.92

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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.