Home / 20,123.30-30,178.11-6,972.60

Finding the Fourth Proportional to 20,123.30, 30,178.11 and 6,972.60

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Solution

The fourth proportional to 20,123.30, 30,178.11 and 6,972.60 is: 10,456.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,123.30 : 30,178.11 = 6,972.60 : x
  2. Step 2: Convert to fraction form
    20,123.30/30,178.11 = 6,972.60/x
  3. Step 3: Cross multiply
    20,123.30x = 30,178.11 × 6,972.60
  4. Step 4: Simplify right side
    20,123.30x = 210,419,889.79
  5. Step 5: Solve for x
    x = 210,419,889.79/20,123.30
  6. Step 6: Final answer
    x = 10,456.53

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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.