Home / 20,861.48-31,293.95-8,379.88

Finding the Fourth Proportional to 20,861.48, 31,293.95 and 8,379.88

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Solution

The fourth proportional to 20,861.48, 31,293.95 and 8,379.88 is: 12,570.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.48 : 31,293.95 = 8,379.88 : x
  2. Step 2: Convert to fraction form
    20,861.48/31,293.95 = 8,379.88/x
  3. Step 3: Cross multiply
    20,861.48x = 31,293.95 × 8,379.88
  4. Step 4: Simplify right side
    20,861.48x = 262,239,668.97
  5. Step 5: Solve for x
    x = 262,239,668.97/20,861.48
  6. Step 6: Final answer
    x = 12,570.52

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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.