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Finding the Fourth Proportional to 12,724.88, 17,561.16 and 7,135.88

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Solution

The fourth proportional to 12,724.88, 17,561.16 and 7,135.88 is: 9,847.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,724.88 : 17,561.16 = 7,135.88 : x
  2. Step 2: Convert to fraction form
    12,724.88/17,561.16 = 7,135.88/x
  3. Step 3: Cross multiply
    12,724.88x = 17,561.16 × 7,135.88
  4. Step 4: Simplify right side
    12,724.88x = 125,314,242.62
  5. Step 5: Solve for x
    x = 125,314,242.62/12,724.88
  6. Step 6: Final answer
    x = 9,847.97

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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.