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Finding the Fourth Proportional to 18,871.38, 26,049.60 and 10,920.42

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Solution

The fourth proportional to 18,871.38, 26,049.60 and 10,920.42 is: 15,074.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.38 : 26,049.60 = 10,920.42 : x
  2. Step 2: Convert to fraction form
    18,871.38/26,049.60 = 10,920.42/x
  3. Step 3: Cross multiply
    18,871.38x = 26,049.60 × 10,920.42
  4. Step 4: Simplify right side
    18,871.38x = 284,472,572.83
  5. Step 5: Solve for x
    x = 284,472,572.83/18,871.38
  6. Step 6: Final answer
    x = 15,074.29

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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.