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Finding the Fourth Proportional to 18,988.43, 28,500.12 and 9,634.95

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Solution

The fourth proportional to 18,988.43, 28,500.12 and 9,634.95 is: 14,461.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,988.43 : 28,500.12 = 9,634.95 : x
  2. Step 2: Convert to fraction form
    18,988.43/28,500.12 = 9,634.95/x
  3. Step 3: Cross multiply
    18,988.43x = 28,500.12 × 9,634.95
  4. Step 4: Simplify right side
    18,988.43x = 274,597,231.19
  5. Step 5: Solve for x
    x = 274,597,231.19/18,988.43
  6. Step 6: Final answer
    x = 14,461.30

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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.