Home / 21,227.31-31,828.77-8,755.92

Finding the Fourth Proportional to 21,227.31, 31,828.77 and 8,755.92

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Solution

The fourth proportional to 21,227.31, 31,828.77 and 8,755.92 is: 13,128.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,227.31 : 31,828.77 = 8,755.92 : x
  2. Step 2: Convert to fraction form
    21,227.31/31,828.77 = 8,755.92/x
  3. Step 3: Cross multiply
    21,227.31x = 31,828.77 × 8,755.92
  4. Step 4: Simplify right side
    21,227.31x = 278,690,163.82
  5. Step 5: Solve for x
    x = 278,690,163.82/21,227.31
  6. Step 6: Final answer
    x = 13,128.85

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1.5x scale

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.