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Finding the Fourth Proportional to 15,126.66, 20,863.17 and 13,426.92

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Solution

The fourth proportional to 15,126.66, 20,863.17 and 13,426.92 is: 18,518.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,126.66 : 20,863.17 = 13,426.92 : x
  2. Step 2: Convert to fraction form
    15,126.66/20,863.17 = 13,426.92/x
  3. Step 3: Cross multiply
    15,126.66x = 20,863.17 × 13,426.92
  4. Step 4: Simplify right side
    15,126.66x = 280,128,114.54
  5. Step 5: Solve for x
    x = 280,128,114.54/15,126.66
  6. Step 6: Final answer
    x = 18,518.83

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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.