Home / 20,874.12-31,311.12-5,291.70

Finding the Fourth Proportional to 20,874.12, 31,311.12 and 5,291.70

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Solution

The fourth proportional to 20,874.12, 31,311.12 and 5,291.70 is: 7,937.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.12 : 31,311.12 = 5,291.70 : x
  2. Step 2: Convert to fraction form
    20,874.12/31,311.12 = 5,291.70/x
  3. Step 3: Cross multiply
    20,874.12x = 31,311.12 × 5,291.70
  4. Step 4: Simplify right side
    20,874.12x = 165,689,053.70
  5. Step 5: Solve for x
    x = 165,689,053.70/20,874.12
  6. Step 6: Final answer
    x = 7,937.53

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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.