Home / 12,938.38-19,416.68-5,149.02

Finding the Fourth Proportional to 12,938.38, 19,416.68 and 5,149.02

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Solution

The fourth proportional to 12,938.38, 19,416.68 and 5,149.02 is: 7,727.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.38 : 19,416.68 = 5,149.02 : x
  2. Step 2: Convert to fraction form
    12,938.38/19,416.68 = 5,149.02/x
  3. Step 3: Cross multiply
    12,938.38x = 19,416.68 × 5,149.02
  4. Step 4: Simplify right side
    12,938.38x = 99,976,873.65
  5. Step 5: Solve for x
    x = 99,976,873.65/12,938.38
  6. Step 6: Final answer
    x = 7,727.16

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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.