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Finding the Fourth Proportional to 12,517.88, 18,687.13 and 11,643.08

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Solution

The fourth proportional to 12,517.88, 18,687.13 and 11,643.08 is: 17,381.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,517.88 : 18,687.13 = 11,643.08 : x
  2. Step 2: Convert to fraction form
    12,517.88/18,687.13 = 11,643.08/x
  3. Step 3: Cross multiply
    12,517.88x = 18,687.13 × 11,643.08
  4. Step 4: Simplify right side
    12,517.88x = 217,575,749.56
  5. Step 5: Solve for x
    x = 217,575,749.56/12,517.88
  6. Step 6: Final answer
    x = 17,381.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.