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Finding the Fourth Proportional to 18,672.13, 25,732.11 and 13,357.72

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Solution

The fourth proportional to 18,672.13, 25,732.11 and 13,357.72 is: 18,408.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.13 : 25,732.11 = 13,357.72 : x
  2. Step 2: Convert to fraction form
    18,672.13/25,732.11 = 13,357.72/x
  3. Step 3: Cross multiply
    18,672.13x = 25,732.11 × 13,357.72
  4. Step 4: Simplify right side
    18,672.13x = 343,722,320.39
  5. Step 5: Solve for x
    x = 343,722,320.39/18,672.13
  6. Step 6: Final answer
    x = 18,408.31

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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.