Home / 20,516.18-28,321.76-12,017.12

Finding the Fourth Proportional to 20,516.18, 28,321.76 and 12,017.12

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Solution

The fourth proportional to 20,516.18, 28,321.76 and 12,017.12 is: 16,589.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.18 : 28,321.76 = 12,017.12 : x
  2. Step 2: Convert to fraction form
    20,516.18/28,321.76 = 12,017.12/x
  3. Step 3: Cross multiply
    20,516.18x = 28,321.76 × 12,017.12
  4. Step 4: Simplify right side
    20,516.18x = 340,345,876.97
  5. Step 5: Solve for x
    x = 340,345,876.97/20,516.18
  6. Step 6: Final answer
    x = 16,589.15

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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.