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Finding the Fourth Proportional to 28,990.80, 43,491.78 and 12,350.52

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Solution

The fourth proportional to 28,990.80, 43,491.78 and 12,350.52 is: 18,528.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,990.80 : 43,491.78 = 12,350.52 : x
  2. Step 2: Convert to fraction form
    28,990.80/43,491.78 = 12,350.52/x
  3. Step 3: Cross multiply
    28,990.80x = 43,491.78 × 12,350.52
  4. Step 4: Simplify right side
    28,990.80x = 537,146,098.73
  5. Step 5: Solve for x
    x = 537,146,098.73/28,990.80
  6. Step 6: Final answer
    x = 18,528.16

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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.