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Finding the Fourth Proportional to 12,542.65, 18,812.42 and 7,280.52

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Solution

The fourth proportional to 12,542.65, 18,812.42 and 7,280.52 is: 10,919.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,542.65 : 18,812.42 = 7,280.52 : x
  2. Step 2: Convert to fraction form
    12,542.65/18,812.42 = 7,280.52/x
  3. Step 3: Cross multiply
    12,542.65x = 18,812.42 × 7,280.52
  4. Step 4: Simplify right side
    12,542.65x = 136,964,120.41
  5. Step 5: Solve for x
    x = 136,964,120.41/12,542.65
  6. Step 6: Final answer
    x = 10,919.87

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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.