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Finding the Fourth Proportional to 18,363.38, 25,341.47 and 9,979.88

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Solution

The fourth proportional to 18,363.38, 25,341.47 and 9,979.88 is: 13,772.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,363.38 : 25,341.47 = 9,979.88 : x
  2. Step 2: Convert to fraction form
    18,363.38/25,341.47 = 9,979.88/x
  3. Step 3: Cross multiply
    18,363.38x = 25,341.47 × 9,979.88
  4. Step 4: Simplify right side
    18,363.38x = 252,904,653.02
  5. Step 5: Solve for x
    x = 252,904,653.02/18,363.38
  6. Step 6: Final answer
    x = 13,772.23

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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.