Home / 20,172.40-30,234.30-10,306.60

Finding the Fourth Proportional to 20,172.40, 30,234.30 and 10,306.60

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Solution

The fourth proportional to 20,172.40, 30,234.30 and 10,306.60 is: 15,447.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.40 : 30,234.30 = 10,306.60 : x
  2. Step 2: Convert to fraction form
    20,172.40/30,234.30 = 10,306.60/x
  3. Step 3: Cross multiply
    20,172.40x = 30,234.30 × 10,306.60
  4. Step 4: Simplify right side
    20,172.40x = 311,612,836.38
  5. Step 5: Solve for x
    x = 311,612,836.38/20,172.40
  6. Step 6: Final answer
    x = 15,447.48

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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.