Home / 20,517.11-28,313.16-12,018.18

Finding the Fourth Proportional to 20,517.11, 28,313.16 and 12,018.18

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Solution

The fourth proportional to 20,517.11, 28,313.16 and 12,018.18 is: 16,584.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.11 : 28,313.16 = 12,018.18 : x
  2. Step 2: Convert to fraction form
    20,517.11/28,313.16 = 12,018.18/x
  3. Step 3: Cross multiply
    20,517.11x = 28,313.16 × 12,018.18
  4. Step 4: Simplify right side
    20,517.11x = 340,272,653.25
  5. Step 5: Solve for x
    x = 340,272,653.25/20,517.11
  6. Step 6: Final answer
    x = 16,584.83

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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.