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Finding the Fourth Proportional to 13,651.61, 20,458.17 and 10,865.88

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Solution

The fourth proportional to 13,651.61, 20,458.17 and 10,865.88 is: 16,283.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,651.61 : 20,458.17 = 10,865.88 : x
  2. Step 2: Convert to fraction form
    13,651.61/20,458.17 = 10,865.88/x
  3. Step 3: Cross multiply
    13,651.61x = 20,458.17 × 10,865.88
  4. Step 4: Simplify right side
    13,651.61x = 222,296,020.24
  5. Step 5: Solve for x
    x = 222,296,020.24/13,651.61
  6. Step 6: Final answer
    x = 16,283.51

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1.5x scale

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.