Home / 9,279.38-13,888.15-7,421.78

Finding the Fourth Proportional to 9,279.38, 13,888.15 and 7,421.78

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Solution

The fourth proportional to 9,279.38, 13,888.15 and 7,421.78 is: 11,107.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,279.38 : 13,888.15 = 7,421.78 : x
  2. Step 2: Convert to fraction form
    9,279.38/13,888.15 = 7,421.78/x
  3. Step 3: Cross multiply
    9,279.38x = 13,888.15 × 7,421.78
  4. Step 4: Simplify right side
    9,279.38x = 103,074,793.91
  5. Step 5: Solve for x
    x = 103,074,793.91/9,279.38
  6. Step 6: Final answer
    x = 11,107.94

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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.