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Finding the Fourth Proportional to 22,490.78, 33,737.79 and 8,639.78

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Solution

The fourth proportional to 22,490.78, 33,737.79 and 8,639.78 is: 12,960.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,490.78 : 33,737.79 = 8,639.78 : x
  2. Step 2: Convert to fraction form
    22,490.78/33,737.79 = 8,639.78/x
  3. Step 3: Cross multiply
    22,490.78x = 33,737.79 × 8,639.78
  4. Step 4: Simplify right side
    22,490.78x = 291,487,083.29
  5. Step 5: Solve for x
    x = 291,487,083.29/22,490.78
  6. Step 6: Final answer
    x = 12,960.29

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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.