Home / 20,923.45-31,387.24-6,877.78

Finding the Fourth Proportional to 20,923.45, 31,387.24 and 6,877.78

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Solution

The fourth proportional to 20,923.45, 31,387.24 and 6,877.78 is: 10,317.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.45 : 31,387.24 = 6,877.78 : x
  2. Step 2: Convert to fraction form
    20,923.45/31,387.24 = 6,877.78/x
  3. Step 3: Cross multiply
    20,923.45x = 31,387.24 × 6,877.78
  4. Step 4: Simplify right side
    20,923.45x = 215,874,531.53
  5. Step 5: Solve for x
    x = 215,874,531.53/20,923.45
  6. Step 6: Final answer
    x = 10,317.35

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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.