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Finding the Fourth Proportional to 18,298.52, 25,251.92 and 9,915

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Solution

The fourth proportional to 18,298.52, 25,251.92 and 9,915 is: 13,682.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,298.52 : 25,251.92 = 9,915 : x
  2. Step 2: Convert to fraction form
    18,298.52/25,251.92 = 9,915/x
  3. Step 3: Cross multiply
    18,298.52x = 25,251.92 × 9,915
  4. Step 4: Simplify right side
    18,298.52x = 250,372,786.80
  5. Step 5: Solve for x
    x = 250,372,786.80/18,298.52
  6. Step 6: Final answer
    x = 13,682.68

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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.