Home / 20,320.20-30,545.10-19,153.80

Finding the Fourth Proportional to 20,320.20, 30,545.10 and 19,153.80

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Solution

The fourth proportional to 20,320.20, 30,545.10 and 19,153.80 is: 28,791.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,320.20 : 30,545.10 = 19,153.80 : x
  2. Step 2: Convert to fraction form
    20,320.20/30,545.10 = 19,153.80/x
  3. Step 3: Cross multiply
    20,320.20x = 30,545.10 × 19,153.80
  4. Step 4: Simplify right side
    20,320.20x = 585,054,736.38
  5. Step 5: Solve for x
    x = 585,054,736.38/20,320.20
  6. Step 6: Final answer
    x = 28,791.78

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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.