Home / 20,787.71-28,687.02-11,227.60

Finding the Fourth Proportional to 20,787.71, 28,687.02 and 11,227.60

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Solution

The fourth proportional to 20,787.71, 28,687.02 and 11,227.60 is: 15,494.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.71 : 28,687.02 = 11,227.60 : x
  2. Step 2: Convert to fraction form
    20,787.71/28,687.02 = 11,227.60/x
  3. Step 3: Cross multiply
    20,787.71x = 28,687.02 × 11,227.60
  4. Step 4: Simplify right side
    20,787.71x = 322,086,385.75
  5. Step 5: Solve for x
    x = 322,086,385.75/20,787.71
  6. Step 6: Final answer
    x = 15,494.08

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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.