Home / 21,074.68-31,620.52-9,379.90

Finding the Fourth Proportional to 21,074.68, 31,620.52 and 9,379.90

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Solution

The fourth proportional to 21,074.68, 31,620.52 and 9,379.90 is: 14,073.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,074.68 : 31,620.52 = 9,379.90 : x
  2. Step 2: Convert to fraction form
    21,074.68/31,620.52 = 9,379.90/x
  3. Step 3: Cross multiply
    21,074.68x = 31,620.52 × 9,379.90
  4. Step 4: Simplify right side
    21,074.68x = 296,597,315.55
  5. Step 5: Solve for x
    x = 296,597,315.55/21,074.68
  6. Step 6: Final answer
    x = 14,073.63

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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.