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Finding the Fourth Proportional to 13,392.57, 20,086.57 and 3,531.95

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Solution

The fourth proportional to 13,392.57, 20,086.57 and 3,531.95 is: 5,297.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,392.57 : 20,086.57 = 3,531.95 : x
  2. Step 2: Convert to fraction form
    13,392.57/20,086.57 = 3,531.95/x
  3. Step 3: Cross multiply
    13,392.57x = 20,086.57 × 3,531.95
  4. Step 4: Simplify right side
    13,392.57x = 70,944,760.91
  5. Step 5: Solve for x
    x = 70,944,760.91/13,392.57
  6. Step 6: Final answer
    x = 5,297.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.