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Finding the Fourth Proportional to 21,593.32, 29,800.90 and 12,640.28

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Solution

The fourth proportional to 21,593.32, 29,800.90 and 12,640.28 is: 17,444.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,593.32 : 29,800.90 = 12,640.28 : x
  2. Step 2: Convert to fraction form
    21,593.32/29,800.90 = 12,640.28/x
  3. Step 3: Cross multiply
    21,593.32x = 29,800.90 × 12,640.28
  4. Step 4: Simplify right side
    21,593.32x = 376,691,720.25
  5. Step 5: Solve for x
    x = 376,691,720.25/21,593.32
  6. Step 6: Final answer
    x = 17,444.83

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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.