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Finding the Fourth Proportional to 18,458.91, 27,691.61 and 7,935.39

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Solution

The fourth proportional to 18,458.91, 27,691.61 and 7,935.39 is: 11,904.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,458.91 : 27,691.61 = 7,935.39 : x
  2. Step 2: Convert to fraction form
    18,458.91/27,691.61 = 7,935.39/x
  3. Step 3: Cross multiply
    18,458.91x = 27,691.61 × 7,935.39
  4. Step 4: Simplify right side
    18,458.91x = 219,743,685.40
  5. Step 5: Solve for x
    x = 219,743,685.40/18,458.91
  6. Step 6: Final answer
    x = 11,904.48

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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.