Home / 25,679.20-38,519.88-8,147.40

Finding the Fourth Proportional to 25,679.20, 38,519.88 and 8,147.40

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Solution

The fourth proportional to 25,679.20, 38,519.88 and 8,147.40 is: 12,221.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,679.20 : 38,519.88 = 8,147.40 : x
  2. Step 2: Convert to fraction form
    25,679.20/38,519.88 = 8,147.40/x
  3. Step 3: Cross multiply
    25,679.20x = 38,519.88 × 8,147.40
  4. Step 4: Simplify right side
    25,679.20x = 313,836,870.31
  5. Step 5: Solve for x
    x = 313,836,870.31/25,679.20
  6. Step 6: Final answer
    x = 12,221.44

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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.