Home / 20,102.60-30,132.30-7,617.80

Finding the Fourth Proportional to 20,102.60, 30,132.30 and 7,617.80

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Solution

The fourth proportional to 20,102.60, 30,132.30 and 7,617.80 is: 11,418.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,102.60 : 30,132.30 = 7,617.80 : x
  2. Step 2: Convert to fraction form
    20,102.60/30,132.30 = 7,617.80/x
  3. Step 3: Cross multiply
    20,102.60x = 30,132.30 × 7,617.80
  4. Step 4: Simplify right side
    20,102.60x = 229,541,834.94
  5. Step 5: Solve for x
    x = 229,541,834.94/20,102.60
  6. Step 6: Final answer
    x = 11,418.51

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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.