Home / 20,778.76-31,174.62-6,937.48

Finding the Fourth Proportional to 20,778.76, 31,174.62 and 6,937.48

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Solution

The fourth proportional to 20,778.76, 31,174.62 and 6,937.48 is: 10,408.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,778.76 : 31,174.62 = 6,937.48 : x
  2. Step 2: Convert to fraction form
    20,778.76/31,174.62 = 6,937.48/x
  3. Step 3: Cross multiply
    20,778.76x = 31,174.62 × 6,937.48
  4. Step 4: Simplify right side
    20,778.76x = 216,273,302.76
  5. Step 5: Solve for x
    x = 216,273,302.76/20,778.76
  6. Step 6: Final answer
    x = 10,408.38

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1.5x scale

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.