Home / 20,517.66-28,323.82-12,018.60

Finding the Fourth Proportional to 20,517.66, 28,323.82 and 12,018.60

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Solution

The fourth proportional to 20,517.66, 28,323.82 and 12,018.60 is: 16,591.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.66 : 28,323.82 = 12,018.60 : x
  2. Step 2: Convert to fraction form
    20,517.66/28,323.82 = 12,018.60/x
  3. Step 3: Cross multiply
    20,517.66x = 28,323.82 × 12,018.60
  4. Step 4: Simplify right side
    20,517.66x = 340,412,663.05
  5. Step 5: Solve for x
    x = 340,412,663.05/20,517.66
  6. Step 6: Final answer
    x = 16,591.20

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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.