Home / 21,318.95-31,960.19-8,180.75

Finding the Fourth Proportional to 21,318.95, 31,960.19 and 8,180.75

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Solution

The fourth proportional to 21,318.95, 31,960.19 and 8,180.75 is: 12,264.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.95 : 31,960.19 = 8,180.75 : x
  2. Step 2: Convert to fraction form
    21,318.95/31,960.19 = 8,180.75/x
  3. Step 3: Cross multiply
    21,318.95x = 31,960.19 × 8,180.75
  4. Step 4: Simplify right side
    21,318.95x = 261,458,324.34
  5. Step 5: Solve for x
    x = 261,458,324.34/21,318.95
  6. Step 6: Final answer
    x = 12,264.13

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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.