Home / 13,608.95-18,781.27-8,306.69

Finding the Fourth Proportional to 13,608.95, 18,781.27 and 8,306.69

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Solution

The fourth proportional to 13,608.95, 18,781.27 and 8,306.69 is: 11,463.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.95 : 18,781.27 = 8,306.69 : x
  2. Step 2: Convert to fraction form
    13,608.95/18,781.27 = 8,306.69/x
  3. Step 3: Cross multiply
    13,608.95x = 18,781.27 × 8,306.69
  4. Step 4: Simplify right side
    13,608.95x = 156,010,073.02
  5. Step 5: Solve for x
    x = 156,010,073.02/13,608.95
  6. Step 6: Final answer
    x = 11,463.79

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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.