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Finding the Fourth Proportional to 13,593.49, 18,765.61 and 9,115.61

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Solution

The fourth proportional to 13,593.49, 18,765.61 and 9,115.61 is: 12,583.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,593.49 : 18,765.61 = 9,115.61 : x
  2. Step 2: Convert to fraction form
    13,593.49/18,765.61 = 9,115.61/x
  3. Step 3: Cross multiply
    13,593.49x = 18,765.61 × 9,115.61
  4. Step 4: Simplify right side
    13,593.49x = 171,059,865.56
  5. Step 5: Solve for x
    x = 171,059,865.56/13,593.49
  6. Step 6: Final answer
    x = 12,583.96

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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.