Home / 20,278.80-30,394.44-9,172.56

Finding the Fourth Proportional to 20,278.80, 30,394.44 and 9,172.56

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Solution

The fourth proportional to 20,278.80, 30,394.44 and 9,172.56 is: 13,748.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.80 : 30,394.44 = 9,172.56 : x
  2. Step 2: Convert to fraction form
    20,278.80/30,394.44 = 9,172.56/x
  3. Step 3: Cross multiply
    20,278.80x = 30,394.44 × 9,172.56
  4. Step 4: Simplify right side
    20,278.80x = 278,794,824.57
  5. Step 5: Solve for x
    x = 278,794,824.57/20,278.80
  6. Step 6: Final answer
    x = 13,748.09

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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.