Home / 28,787.64-39,715.12-21,251.92

Finding the Fourth Proportional to 28,787.64, 39,715.12 and 21,251.92

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Solution

The fourth proportional to 28,787.64, 39,715.12 and 21,251.92 is: 29,318.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,787.64 : 39,715.12 = 21,251.92 : x
  2. Step 2: Convert to fraction form
    28,787.64/39,715.12 = 21,251.92/x
  3. Step 3: Cross multiply
    28,787.64x = 39,715.12 × 21,251.92
  4. Step 4: Simplify right side
    28,787.64x = 844,022,553.03
  5. Step 5: Solve for x
    x = 844,022,553.03/28,787.64
  6. Step 6: Final answer
    x = 29,318.92

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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.