Home / 21,270.52-31,905.77-5,687.74

Finding the Fourth Proportional to 21,270.52, 31,905.77 and 5,687.74

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Solution

The fourth proportional to 21,270.52, 31,905.77 and 5,687.74 is: 8,531.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.52 : 31,905.77 = 5,687.74 : x
  2. Step 2: Convert to fraction form
    21,270.52/31,905.77 = 5,687.74/x
  3. Step 3: Cross multiply
    21,270.52x = 31,905.77 × 5,687.74
  4. Step 4: Simplify right side
    21,270.52x = 181,471,564.73
  5. Step 5: Solve for x
    x = 181,471,564.73/21,270.52
  6. Step 6: Final answer
    x = 8,531.60

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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.