Home / 20,080.85-30,123.92-7,428.88

Finding the Fourth Proportional to 20,080.85, 30,123.92 and 7,428.88

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Solution

The fourth proportional to 20,080.85, 30,123.92 and 7,428.88 is: 11,144.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.85 : 30,123.92 = 7,428.88 : x
  2. Step 2: Convert to fraction form
    20,080.85/30,123.92 = 7,428.88/x
  3. Step 3: Cross multiply
    20,080.85x = 30,123.92 × 7,428.88
  4. Step 4: Simplify right side
    20,080.85x = 223,787,043.04
  5. Step 5: Solve for x
    x = 223,787,043.04/20,080.85
  6. Step 6: Final answer
    x = 11,144.30

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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.