Home / 21,390.32-29,517.90-11,958.86

Finding the Fourth Proportional to 21,390.32, 29,517.90 and 11,958.86

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Solution

The fourth proportional to 21,390.32, 29,517.90 and 11,958.86 is: 16,502.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.32 : 29,517.90 = 11,958.86 : x
  2. Step 2: Convert to fraction form
    21,390.32/29,517.90 = 11,958.86/x
  3. Step 3: Cross multiply
    21,390.32x = 29,517.90 × 11,958.86
  4. Step 4: Simplify right side
    21,390.32x = 353,000,433.59
  5. Step 5: Solve for x
    x = 353,000,433.59/21,390.32
  6. Step 6: Final answer
    x = 16,502.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.