Home / 20,787.97-28,687.40-11,227.87

Finding the Fourth Proportional to 20,787.97, 28,687.40 and 11,227.87

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Solution

The fourth proportional to 20,787.97, 28,687.40 and 11,227.87 is: 15,494.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.97 : 28,687.40 = 11,227.87 : x
  2. Step 2: Convert to fraction form
    20,787.97/28,687.40 = 11,227.87/x
  3. Step 3: Cross multiply
    20,787.97x = 28,687.40 × 11,227.87
  4. Step 4: Simplify right side
    20,787.97x = 322,098,397.84
  5. Step 5: Solve for x
    x = 322,098,397.84/20,787.97
  6. Step 6: Final answer
    x = 15,494.46

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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.