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Finding the Fourth Proportional to 18,680.88, 25,744.17 and 13,366.47

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Solution

The fourth proportional to 18,680.88, 25,744.17 and 13,366.47 is: 18,420.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,680.88 : 25,744.17 = 13,366.47 : x
  2. Step 2: Convert to fraction form
    18,680.88/25,744.17 = 13,366.47/x
  3. Step 3: Cross multiply
    18,680.88x = 25,744.17 × 13,366.47
  4. Step 4: Simplify right side
    18,680.88x = 344,108,675.98
  5. Step 5: Solve for x
    x = 344,108,675.98/18,680.88
  6. Step 6: Final answer
    x = 18,420.37

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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.