Home / 12,419.55-17,132.95-7,380.20

Finding the Fourth Proportional to 12,419.55, 17,132.95 and 7,380.20

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Solution

The fourth proportional to 12,419.55, 17,132.95 and 7,380.20 is: 10,181.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,419.55 : 17,132.95 = 7,380.20 : x
  2. Step 2: Convert to fraction form
    12,419.55/17,132.95 = 7,380.20/x
  3. Step 3: Cross multiply
    12,419.55x = 17,132.95 × 7,380.20
  4. Step 4: Simplify right side
    12,419.55x = 126,444,649.65
  5. Step 5: Solve for x
    x = 126,444,649.65/12,419.55
  6. Step 6: Final answer
    x = 10,181.10

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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.