Home / 20,744.86-31,122.16-12,748.54

Finding the Fourth Proportional to 20,744.86, 31,122.16 and 12,748.54

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Solution

The fourth proportional to 20,744.86, 31,122.16 and 12,748.54 is: 19,125.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,744.86 : 31,122.16 = 12,748.54 : x
  2. Step 2: Convert to fraction form
    20,744.86/31,122.16 = 12,748.54/x
  3. Step 3: Cross multiply
    20,744.86x = 31,122.16 × 12,748.54
  4. Step 4: Simplify right side
    20,744.86x = 396,762,101.65
  5. Step 5: Solve for x
    x = 396,762,101.65/20,744.86
  6. Step 6: Final answer
    x = 19,125.80

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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.