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Finding the Fourth Proportional to 18,364.38, 25,342.86 and 9,980.88

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Solution

The fourth proportional to 18,364.38, 25,342.86 and 9,980.88 is: 13,773.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,364.38 : 25,342.86 = 9,980.88 : x
  2. Step 2: Convert to fraction form
    18,364.38/25,342.86 = 9,980.88/x
  3. Step 3: Cross multiply
    18,364.38x = 25,342.86 × 9,980.88
  4. Step 4: Simplify right side
    18,364.38x = 252,944,044.52
  5. Step 5: Solve for x
    x = 252,944,044.52/18,364.38
  6. Step 6: Final answer
    x = 13,773.62

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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.