Home / 25,720.20-38,580.30-8,191.80

Finding the Fourth Proportional to 25,720.20, 38,580.30 and 8,191.80

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Solution

The fourth proportional to 25,720.20, 38,580.30 and 8,191.80 is: 12,287.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,720.20 : 38,580.30 = 8,191.80 : x
  2. Step 2: Convert to fraction form
    25,720.20/38,580.30 = 8,191.80/x
  3. Step 3: Cross multiply
    25,720.20x = 38,580.30 × 8,191.80
  4. Step 4: Simplify right side
    25,720.20x = 316,042,101.54
  5. Step 5: Solve for x
    x = 316,042,101.54/25,720.20
  6. Step 6: Final answer
    x = 12,287.70

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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.