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Finding the Fourth Proportional to 15,087.45, 20,818.87 and 8,371.47

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Solution

The fourth proportional to 15,087.45, 20,818.87 and 8,371.47 is: 11,551.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,087.45 : 20,818.87 = 8,371.47 : x
  2. Step 2: Convert to fraction form
    15,087.45/20,818.87 = 8,371.47/x
  3. Step 3: Cross multiply
    15,087.45x = 20,818.87 × 8,371.47
  4. Step 4: Simplify right side
    15,087.45x = 174,284,545.64
  5. Step 5: Solve for x
    x = 174,284,545.64/15,087.45
  6. Step 6: Final answer
    x = 11,551.62

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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.