Home / 20,911.96-31,371.85-6,876.05

Finding the Fourth Proportional to 20,911.96, 31,371.85 and 6,876.05

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Solution

The fourth proportional to 20,911.96, 31,371.85 and 6,876.05 is: 10,315.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.96 : 31,371.85 = 6,876.05 : x
  2. Step 2: Convert to fraction form
    20,911.96/31,371.85 = 6,876.05/x
  3. Step 3: Cross multiply
    20,911.96x = 31,371.85 × 6,876.05
  4. Step 4: Simplify right side
    20,911.96x = 215,714,217.95
  5. Step 5: Solve for x
    x = 215,714,217.95/20,911.96
  6. Step 6: Final answer
    x = 10,315.35

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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.