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Finding the Fourth Proportional to 13,375.71, 18,462.48 and 8,660.31

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Solution

The fourth proportional to 13,375.71, 18,462.48 and 8,660.31 is: 11,953.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,375.71 : 18,462.48 = 8,660.31 : x
  2. Step 2: Convert to fraction form
    13,375.71/18,462.48 = 8,660.31/x
  3. Step 3: Cross multiply
    13,375.71x = 18,462.48 × 8,660.31
  4. Step 4: Simplify right side
    13,375.71x = 159,890,800.17
  5. Step 5: Solve for x
    x = 159,890,800.17/13,375.71
  6. Step 6: Final answer
    x = 11,953.82

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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.