Home / 20,346.76-28,081.32-12,280.83

Finding the Fourth Proportional to 20,346.76, 28,081.32 and 12,280.83

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Solution

The fourth proportional to 20,346.76, 28,081.32 and 12,280.83 is: 16,949.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,346.76 : 28,081.32 = 12,280.83 : x
  2. Step 2: Convert to fraction form
    20,346.76/28,081.32 = 12,280.83/x
  3. Step 3: Cross multiply
    20,346.76x = 28,081.32 × 12,280.83
  4. Step 4: Simplify right side
    20,346.76x = 344,861,923.69
  5. Step 5: Solve for x
    x = 344,861,923.69/20,346.76
  6. Step 6: Final answer
    x = 16,949.23

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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.