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Finding the Fourth Proportional to 13,372.71, 18,458.34 and 8,657.31

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Solution

The fourth proportional to 13,372.71, 18,458.34 and 8,657.31 is: 11,949.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,372.71 : 18,458.34 = 8,657.31 : x
  2. Step 2: Convert to fraction form
    13,372.71/18,458.34 = 8,657.31/x
  3. Step 3: Cross multiply
    13,372.71x = 18,458.34 × 8,657.31
  4. Step 4: Simplify right side
    13,372.71x = 159,799,571.47
  5. Step 5: Solve for x
    x = 159,799,571.47/13,372.71
  6. Step 6: Final answer
    x = 11,949.68

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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.