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Finding the Fourth Proportional to 18,983.31, 28,478.54 and 9,500.69

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Solution

The fourth proportional to 18,983.31, 28,478.54 and 9,500.69 is: 14,252.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.31 : 28,478.54 = 9,500.69 : x
  2. Step 2: Convert to fraction form
    18,983.31/28,478.54 = 9,500.69/x
  3. Step 3: Cross multiply
    18,983.31x = 28,478.54 × 9,500.69
  4. Step 4: Simplify right side
    18,983.31x = 270,565,821.70
  5. Step 5: Solve for x
    x = 270,565,821.70/18,983.31
  6. Step 6: Final answer
    x = 14,252.82

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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.