Home / 21,270.20-31,905.33-5,687.82

Finding the Fourth Proportional to 21,270.20, 31,905.33 and 5,687.82

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Solution

The fourth proportional to 21,270.20, 31,905.33 and 5,687.82 is: 8,531.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.20 : 31,905.33 = 5,687.82 : x
  2. Step 2: Convert to fraction form
    21,270.20/31,905.33 = 5,687.82/x
  3. Step 3: Cross multiply
    21,270.20x = 31,905.33 × 5,687.82
  4. Step 4: Simplify right side
    21,270.20x = 181,471,774.08
  5. Step 5: Solve for x
    x = 181,471,774.08/21,270.20
  6. Step 6: Final answer
    x = 8,531.74

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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.