Home / 21,418.67-32,129.25-8,271.11

Finding the Fourth Proportional to 21,418.67, 32,129.25 and 8,271.11

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Solution

The fourth proportional to 21,418.67, 32,129.25 and 8,271.11 is: 12,407.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,418.67 : 32,129.25 = 8,271.11 : x
  2. Step 2: Convert to fraction form
    21,418.67/32,129.25 = 8,271.11/x
  3. Step 3: Cross multiply
    21,418.67x = 32,129.25 × 8,271.11
  4. Step 4: Simplify right side
    21,418.67x = 265,744,560.97
  5. Step 5: Solve for x
    x = 265,744,560.97/21,418.67
  6. Step 6: Final answer
    x = 12,407.15

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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.