Home / 20,921.01-31,374.84-6,877.80

Finding the Fourth Proportional to 20,921.01, 31,374.84 and 6,877.80

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Solution

The fourth proportional to 20,921.01, 31,374.84 and 6,877.80 is: 10,314.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.01 : 31,374.84 = 6,877.80 : x
  2. Step 2: Convert to fraction form
    20,921.01/31,374.84 = 6,877.80/x
  3. Step 3: Cross multiply
    20,921.01x = 31,374.84 × 6,877.80
  4. Step 4: Simplify right side
    20,921.01x = 215,789,874.55
  5. Step 5: Solve for x
    x = 215,789,874.55/20,921.01
  6. Step 6: Final answer
    x = 10,314.51

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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.