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Finding the Fourth Proportional to 13,593.74, 18,765.95 and 9,115.86

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Solution

The fourth proportional to 13,593.74, 18,765.95 and 9,115.86 is: 12,584.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,593.74 : 18,765.95 = 9,115.86 : x
  2. Step 2: Convert to fraction form
    13,593.74/18,765.95 = 9,115.86/x
  3. Step 3: Cross multiply
    13,593.74x = 18,765.95 × 9,115.86
  4. Step 4: Simplify right side
    13,593.74x = 171,067,701.93
  5. Step 5: Solve for x
    x = 171,067,701.93/13,593.74
  6. Step 6: Final answer
    x = 12,584.30

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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.