Home / 21,086.90-31,649.50-11,234.48

Finding the Fourth Proportional to 21,086.90, 31,649.50 and 11,234.48

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Solution

The fourth proportional to 21,086.90, 31,649.50 and 11,234.48 is: 16,861.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.90 : 31,649.50 = 11,234.48 : x
  2. Step 2: Convert to fraction form
    21,086.90/31,649.50 = 11,234.48/x
  3. Step 3: Cross multiply
    21,086.90x = 31,649.50 × 11,234.48
  4. Step 4: Simplify right side
    21,086.90x = 355,565,674.76
  5. Step 5: Solve for x
    x = 355,565,674.76/21,086.90
  6. Step 6: Final answer
    x = 16,861.92

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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.