Home / 20,320.48-30,474.42-7,169.78

Finding the Fourth Proportional to 20,320.48, 30,474.42 and 7,169.78

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Solution

The fourth proportional to 20,320.48, 30,474.42 and 7,169.78 is: 10,752.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.48 : 30,474.42 = 7,169.78 : x
  2. Step 2: Convert to fraction form
    20,320.48/30,474.42 = 7,169.78/x
  3. Step 3: Cross multiply
    20,320.48x = 30,474.42 × 7,169.78
  4. Step 4: Simplify right side
    20,320.48x = 218,494,734.66
  5. Step 5: Solve for x
    x = 218,494,734.66/20,320.48
  6. Step 6: Final answer
    x = 10,752.44

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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.