Home / 18,115.38-27,129.18-9,207.28

Finding the Fourth Proportional to 18,115.38, 27,129.18 and 9,207.28

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Solution

The fourth proportional to 18,115.38, 27,129.18 and 9,207.28 is: 13,788.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.38 : 27,129.18 = 9,207.28 : x
  2. Step 2: Convert to fraction form
    18,115.38/27,129.18 = 9,207.28/x
  3. Step 3: Cross multiply
    18,115.38x = 27,129.18 × 9,207.28
  4. Step 4: Simplify right side
    18,115.38x = 249,785,956.43
  5. Step 5: Solve for x
    x = 249,785,956.43/18,115.38
  6. Step 6: Final answer
    x = 13,788.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.