Home / 25,691.20-38,536.80-7,220.80

Finding the Fourth Proportional to 25,691.20, 38,536.80 and 7,220.80

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Solution

The fourth proportional to 25,691.20, 38,536.80 and 7,220.80 is: 10,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,691.20 : 38,536.80 = 7,220.80 : x
  2. Step 2: Convert to fraction form
    25,691.20/38,536.80 = 7,220.80/x
  3. Step 3: Cross multiply
    25,691.20x = 38,536.80 × 7,220.80
  4. Step 4: Simplify right side
    25,691.20x = 278,266,525.44
  5. Step 5: Solve for x
    x = 278,266,525.44/25,691.20
  6. Step 6: Final answer
    x = 10,831.20

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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.