Home / 20,738.76-31,108.13-5,156.39

Finding the Fourth Proportional to 20,738.76, 31,108.13 and 5,156.39

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Solution

The fourth proportional to 20,738.76, 31,108.13 and 5,156.39 is: 7,734.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.76 : 31,108.13 = 5,156.39 : x
  2. Step 2: Convert to fraction form
    20,738.76/31,108.13 = 5,156.39/x
  3. Step 3: Cross multiply
    20,738.76x = 31,108.13 × 5,156.39
  4. Step 4: Simplify right side
    20,738.76x = 160,405,469.13
  5. Step 5: Solve for x
    x = 160,405,469.13/20,738.76
  6. Step 6: Final answer
    x = 7,734.57

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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.