Home / 13,455.20-18,565.16-8,149.92

Finding the Fourth Proportional to 13,455.20, 18,565.16 and 8,149.92

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Solution

The fourth proportional to 13,455.20, 18,565.16 and 8,149.92 is: 11,245.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,455.20 : 18,565.16 = 8,149.92 : x
  2. Step 2: Convert to fraction form
    13,455.20/18,565.16 = 8,149.92/x
  3. Step 3: Cross multiply
    13,455.20x = 18,565.16 × 8,149.92
  4. Step 4: Simplify right side
    13,455.20x = 151,304,568.79
  5. Step 5: Solve for x
    x = 151,304,568.79/13,455.20
  6. Step 6: Final answer
    x = 11,245.06

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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.