Home / 20,895.11-31,350.66-12,581.06

Finding the Fourth Proportional to 20,895.11, 31,350.66 and 12,581.06

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Solution

The fourth proportional to 20,895.11, 31,350.66 and 12,581.06 is: 18,876.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,895.11 : 31,350.66 = 12,581.06 : x
  2. Step 2: Convert to fraction form
    20,895.11/31,350.66 = 12,581.06/x
  3. Step 3: Cross multiply
    20,895.11x = 31,350.66 × 12,581.06
  4. Step 4: Simplify right side
    20,895.11x = 394,424,612.88
  5. Step 5: Solve for x
    x = 394,424,612.88/20,895.11
  6. Step 6: Final answer
    x = 18,876.41

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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.