Home / 21,102.38-31,664.37-8,631.62

Finding the Fourth Proportional to 21,102.38, 31,664.37 and 8,631.62

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Solution

The fourth proportional to 21,102.38, 31,664.37 and 8,631.62 is: 12,951.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.38 : 31,664.37 = 8,631.62 : x
  2. Step 2: Convert to fraction form
    21,102.38/31,664.37 = 8,631.62/x
  3. Step 3: Cross multiply
    21,102.38x = 31,664.37 × 8,631.62
  4. Step 4: Simplify right side
    21,102.38x = 273,314,809.38
  5. Step 5: Solve for x
    x = 273,314,809.38/21,102.38
  6. Step 6: Final answer
    x = 12,951.85

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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.