Home / 12,145.26-18,217.79-3,380.15

Finding the Fourth Proportional to 12,145.26, 18,217.79 and 3,380.15

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Solution

The fourth proportional to 12,145.26, 18,217.79 and 3,380.15 is: 5,070.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.26 : 18,217.79 = 3,380.15 : x
  2. Step 2: Convert to fraction form
    12,145.26/18,217.79 = 3,380.15/x
  3. Step 3: Cross multiply
    12,145.26x = 18,217.79 × 3,380.15
  4. Step 4: Simplify right side
    12,145.26x = 61,578,862.87
  5. Step 5: Solve for x
    x = 61,578,862.87/12,145.26
  6. Step 6: Final answer
    x = 5,070.20

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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.