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Finding the Fourth Proportional to 22,787.29, 31,410.65 and 15,604.78

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Solution

The fourth proportional to 22,787.29, 31,410.65 and 15,604.78 is: 21,510.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,787.29 : 31,410.65 = 15,604.78 : x
  2. Step 2: Convert to fraction form
    22,787.29/31,410.65 = 15,604.78/x
  3. Step 3: Cross multiply
    22,787.29x = 31,410.65 × 15,604.78
  4. Step 4: Simplify right side
    22,787.29x = 490,156,282.91
  5. Step 5: Solve for x
    x = 490,156,282.91/22,787.29
  6. Step 6: Final answer
    x = 21,510.07

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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.