Home / 20,742.04-31,104.20-7,910.80

Finding the Fourth Proportional to 20,742.04, 31,104.20 and 7,910.80

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Solution

The fourth proportional to 20,742.04, 31,104.20 and 7,910.80 is: 11,862.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,742.04 : 31,104.20 = 7,910.80 : x
  2. Step 2: Convert to fraction form
    20,742.04/31,104.20 = 7,910.80/x
  3. Step 3: Cross multiply
    20,742.04x = 31,104.20 × 7,910.80
  4. Step 4: Simplify right side
    20,742.04x = 246,059,105.36
  5. Step 5: Solve for x
    x = 246,059,105.36/20,742.04
  6. Step 6: Final answer
    x = 11,862.82

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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.