Home / 20,962.24-31,443.35-5,379.86

Finding the Fourth Proportional to 20,962.24, 31,443.35 and 5,379.86

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Solution

The fourth proportional to 20,962.24, 31,443.35 and 5,379.86 is: 8,069.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,962.24 : 31,443.35 = 5,379.86 : x
  2. Step 2: Convert to fraction form
    20,962.24/31,443.35 = 5,379.86/x
  3. Step 3: Cross multiply
    20,962.24x = 31,443.35 × 5,379.86
  4. Step 4: Simplify right side
    20,962.24x = 169,160,872.64
  5. Step 5: Solve for x
    x = 169,160,872.64/20,962.24
  6. Step 6: Final answer
    x = 8,069.79

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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.