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Finding the Fourth Proportional to 22,520.68, 33,734.88 and 12,639.20

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Solution

The fourth proportional to 22,520.68, 33,734.88 and 12,639.20 is: 18,932.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,520.68 : 33,734.88 = 12,639.20 : x
  2. Step 2: Convert to fraction form
    22,520.68/33,734.88 = 12,639.20/x
  3. Step 3: Cross multiply
    22,520.68x = 33,734.88 × 12,639.20
  4. Step 4: Simplify right side
    22,520.68x = 426,381,895.30
  5. Step 5: Solve for x
    x = 426,381,895.30/22,520.68
  6. Step 6: Final answer
    x = 18,932.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.