Home / 12,419.47-17,138.77-7,387.53

Finding the Fourth Proportional to 12,419.47, 17,138.77 and 7,387.53

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Solution

The fourth proportional to 12,419.47, 17,138.77 and 7,387.53 is: 10,194.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,419.47 : 17,138.77 = 7,387.53 : x
  2. Step 2: Convert to fraction form
    12,419.47/17,138.77 = 7,387.53/x
  3. Step 3: Cross multiply
    12,419.47x = 17,138.77 × 7,387.53
  4. Step 4: Simplify right side
    12,419.47x = 126,613,177.54
  5. Step 5: Solve for x
    x = 126,613,177.54/12,419.47
  6. Step 6: Final answer
    x = 10,194.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.