Home / 21,154.34-31,721.11-8,670.96

Finding the Fourth Proportional to 21,154.34, 31,721.11 and 8,670.96

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Solution

The fourth proportional to 21,154.34, 31,721.11 and 8,670.96 is: 13,002.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,154.34 : 31,721.11 = 8,670.96 : x
  2. Step 2: Convert to fraction form
    21,154.34/31,721.11 = 8,670.96/x
  3. Step 3: Cross multiply
    21,154.34x = 31,721.11 × 8,670.96
  4. Step 4: Simplify right side
    21,154.34x = 275,052,475.97
  5. Step 5: Solve for x
    x = 275,052,475.97/21,154.34
  6. Step 6: Final answer
    x = 13,002.18

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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.