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Finding the Fourth Proportional to 18,414.88, 25,412.88 and 10,967.20

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Solution

The fourth proportional to 18,414.88, 25,412.88 and 10,967.20 is: 15,134.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,414.88 : 25,412.88 = 10,967.20 : x
  2. Step 2: Convert to fraction form
    18,414.88/25,412.88 = 10,967.20/x
  3. Step 3: Cross multiply
    18,414.88x = 25,412.88 × 10,967.20
  4. Step 4: Simplify right side
    18,414.88x = 278,708,137.54
  5. Step 5: Solve for x
    x = 278,708,137.54/18,414.88
  6. Step 6: Final answer
    x = 15,134.94

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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.