Home / 21,057.86-31,586.72-8,575.11

Finding the Fourth Proportional to 21,057.86, 31,586.72 and 8,575.11

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Solution

The fourth proportional to 21,057.86, 31,586.72 and 8,575.11 is: 12,862.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,057.86 : 31,586.72 = 8,575.11 : x
  2. Step 2: Convert to fraction form
    21,057.86/31,586.72 = 8,575.11/x
  3. Step 3: Cross multiply
    21,057.86x = 31,586.72 × 8,575.11
  4. Step 4: Simplify right side
    21,057.86x = 270,859,619.98
  5. Step 5: Solve for x
    x = 270,859,619.98/21,057.86
  6. Step 6: Final answer
    x = 12,862.64

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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.