Home / 9,939.39-13,717.14-5,691.78

Finding the Fourth Proportional to 9,939.39, 13,717.14 and 5,691.78

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Solution

The fourth proportional to 9,939.39, 13,717.14 and 5,691.78 is: 7,855.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,939.39 : 13,717.14 = 5,691.78 : x
  2. Step 2: Convert to fraction form
    9,939.39/13,717.14 = 5,691.78/x
  3. Step 3: Cross multiply
    9,939.39x = 13,717.14 × 5,691.78
  4. Step 4: Simplify right side
    9,939.39x = 78,074,921.77
  5. Step 5: Solve for x
    x = 78,074,921.77/9,939.39
  6. Step 6: Final answer
    x = 7,855.10

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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.