Home / 20,871.45-31,307.17-10,874.12

Finding the Fourth Proportional to 20,871.45, 31,307.17 and 10,874.12

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Solution

The fourth proportional to 20,871.45, 31,307.17 and 10,874.12 is: 16,311.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,871.45 : 31,307.17 = 10,874.12 : x
  2. Step 2: Convert to fraction form
    20,871.45/31,307.17 = 10,874.12/x
  3. Step 3: Cross multiply
    20,871.45x = 31,307.17 × 10,874.12
  4. Step 4: Simplify right side
    20,871.45x = 340,437,923.44
  5. Step 5: Solve for x
    x = 340,437,923.44/20,871.45
  6. Step 6: Final answer
    x = 16,311.18

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.