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Finding the Fourth Proportional to 17,115.80, 25,712.10 and 11,931.80

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Solution

The fourth proportional to 17,115.80, 25,712.10 and 11,931.80 is: 17,924.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,115.80 : 25,712.10 = 11,931.80 : x
  2. Step 2: Convert to fraction form
    17,115.80/25,712.10 = 11,931.80/x
  3. Step 3: Cross multiply
    17,115.80x = 25,712.10 × 11,931.80
  4. Step 4: Simplify right side
    17,115.80x = 306,791,634.78
  5. Step 5: Solve for x
    x = 306,791,634.78/17,115.80
  6. Step 6: Final answer
    x = 17,924.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.