Home / 20,728.14-31,066.18-8,867.98

Finding the Fourth Proportional to 20,728.14, 31,066.18 and 8,867.98

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Solution

The fourth proportional to 20,728.14, 31,066.18 and 8,867.98 is: 13,290.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728.14 : 31,066.18 = 8,867.98 : x
  2. Step 2: Convert to fraction form
    20,728.14/31,066.18 = 8,867.98/x
  3. Step 3: Cross multiply
    20,728.14x = 31,066.18 × 8,867.98
  4. Step 4: Simplify right side
    20,728.14x = 275,494,262.92
  5. Step 5: Solve for x
    x = 275,494,262.92/20,728.14
  6. Step 6: Final answer
    x = 13,290.83

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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.