Home / 20,889.82-31,337.16-8,414.20

Finding the Fourth Proportional to 20,889.82, 31,337.16 and 8,414.20

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Solution

The fourth proportional to 20,889.82, 31,337.16 and 8,414.20 is: 12,622.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.82 : 31,337.16 = 8,414.20 : x
  2. Step 2: Convert to fraction form
    20,889.82/31,337.16 = 8,414.20/x
  3. Step 3: Cross multiply
    20,889.82x = 31,337.16 × 8,414.20
  4. Step 4: Simplify right side
    20,889.82x = 263,677,131.67
  5. Step 5: Solve for x
    x = 263,677,131.67/20,889.82
  6. Step 6: Final answer
    x = 12,622.28

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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.