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Finding the Fourth Proportional to 14,591.68, 20,138 and 8,625.28

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Solution

The fourth proportional to 14,591.68, 20,138 and 8,625.28 is: 11,903.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,591.68 : 20,138 = 8,625.28 : x
  2. Step 2: Convert to fraction form
    14,591.68/20,138 = 8,625.28/x
  3. Step 3: Cross multiply
    14,591.68x = 20,138 × 8,625.28
  4. Step 4: Simplify right side
    14,591.68x = 173,695,888.64
  5. Step 5: Solve for x
    x = 173,695,888.64/14,591.68
  6. Step 6: Final answer
    x = 11,903.76

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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.