Home / 20,781.79-31,177.07-6,740.73

Finding the Fourth Proportional to 20,781.79, 31,177.07 and 6,740.73

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Solution

The fourth proportional to 20,781.79, 31,177.07 and 6,740.73 is: 10,112.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,781.79 : 31,177.07 = 6,740.73 : x
  2. Step 2: Convert to fraction form
    20,781.79/31,177.07 = 6,740.73/x
  3. Step 3: Cross multiply
    20,781.79x = 31,177.07 × 6,740.73
  4. Step 4: Simplify right side
    20,781.79x = 210,156,204.41
  5. Step 5: Solve for x
    x = 210,156,204.41/20,781.79
  6. Step 6: Final answer
    x = 10,112.51

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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.