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Finding the Fourth Proportional to 12,520.59, 17,278.41 and 6,931.59

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Solution

The fourth proportional to 12,520.59, 17,278.41 and 6,931.59 is: 9,565.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,520.59 : 17,278.41 = 6,931.59 : x
  2. Step 2: Convert to fraction form
    12,520.59/17,278.41 = 6,931.59/x
  3. Step 3: Cross multiply
    12,520.59x = 17,278.41 × 6,931.59
  4. Step 4: Simplify right side
    12,520.59x = 119,766,853.97
  5. Step 5: Solve for x
    x = 119,766,853.97/12,520.59
  6. Step 6: Final answer
    x = 9,565.59

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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.