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Finding the Fourth Proportional to 18,251.39, 25,186.95 and 9,867.89

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Solution

The fourth proportional to 18,251.39, 25,186.95 and 9,867.89 is: 13,617.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,251.39 : 25,186.95 = 9,867.89 : x
  2. Step 2: Convert to fraction form
    18,251.39/25,186.95 = 9,867.89/x
  3. Step 3: Cross multiply
    18,251.39x = 25,186.95 × 9,867.89
  4. Step 4: Simplify right side
    18,251.39x = 248,541,901.43
  5. Step 5: Solve for x
    x = 248,541,901.43/18,251.39
  6. Step 6: Final answer
    x = 13,617.70

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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.