Home / 20,647.62-28,500.42-12,149.28

Finding the Fourth Proportional to 20,647.62, 28,500.42 and 12,149.28

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Solution

The fourth proportional to 20,647.62, 28,500.42 and 12,149.28 is: 16,769.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.62 : 28,500.42 = 12,149.28 : x
  2. Step 2: Convert to fraction form
    20,647.62/28,500.42 = 12,149.28/x
  3. Step 3: Cross multiply
    20,647.62x = 28,500.42 × 12,149.28
  4. Step 4: Simplify right side
    20,647.62x = 346,259,582.70
  5. Step 5: Solve for x
    x = 346,259,582.70/20,647.62
  6. Step 6: Final answer
    x = 16,769.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.