Home / 11,365.11-15,691.55-7,117.88

Finding the Fourth Proportional to 11,365.11, 15,691.55 and 7,117.88

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Solution

The fourth proportional to 11,365.11, 15,691.55 and 7,117.88 is: 9,827.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,365.11 : 15,691.55 = 7,117.88 : x
  2. Step 2: Convert to fraction form
    11,365.11/15,691.55 = 7,117.88/x
  3. Step 3: Cross multiply
    11,365.11x = 15,691.55 × 7,117.88
  4. Step 4: Simplify right side
    11,365.11x = 111,690,455.87
  5. Step 5: Solve for x
    x = 111,690,455.87/11,365.11
  6. Step 6: Final answer
    x = 9,827.49

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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.