Home / 12,154.25-18,231.80-4,255.17

Finding the Fourth Proportional to 12,154.25, 18,231.80 and 4,255.17

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Solution

The fourth proportional to 12,154.25, 18,231.80 and 4,255.17 is: 6,382.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,154.25 : 18,231.80 = 4,255.17 : x
  2. Step 2: Convert to fraction form
    12,154.25/18,231.80 = 4,255.17/x
  3. Step 3: Cross multiply
    12,154.25x = 18,231.80 × 4,255.17
  4. Step 4: Simplify right side
    12,154.25x = 77,579,387.13
  5. Step 5: Solve for x
    x = 77,579,387.13/12,154.25
  6. Step 6: Final answer
    x = 6,382.90

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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.