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Finding the Fourth Proportional to 12,162.99, 18,242.46 and 3,398.79

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Solution

The fourth proportional to 12,162.99, 18,242.46 and 3,398.79 is: 5,097.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,162.99 : 18,242.46 = 3,398.79 : x
  2. Step 2: Convert to fraction form
    12,162.99/18,242.46 = 3,398.79/x
  3. Step 3: Cross multiply
    12,162.99x = 18,242.46 × 3,398.79
  4. Step 4: Simplify right side
    12,162.99x = 62,002,290.62
  5. Step 5: Solve for x
    x = 62,002,290.62/12,162.99
  6. Step 6: Final answer
    x = 5,097.62

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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.