Home / 21,255.93-31,856.13-8,761.68

Finding the Fourth Proportional to 21,255.93, 31,856.13 and 8,761.68

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Solution

The fourth proportional to 21,255.93, 31,856.13 and 8,761.68 is: 13,131.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,255.93 : 31,856.13 = 8,761.68 : x
  2. Step 2: Convert to fraction form
    21,255.93/31,856.13 = 8,761.68/x
  3. Step 3: Cross multiply
    21,255.93x = 31,856.13 × 8,761.68
  4. Step 4: Simplify right side
    21,255.93x = 279,113,217.10
  5. Step 5: Solve for x
    x = 279,113,217.10/21,255.93
  6. Step 6: Final answer
    x = 13,131.08

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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.