Home / 20,842.38-31,254.12-7,685.46

Finding the Fourth Proportional to 20,842.38, 31,254.12 and 7,685.46

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Solution

The fourth proportional to 20,842.38, 31,254.12 and 7,685.46 is: 11,524.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,842.38 : 31,254.12 = 7,685.46 : x
  2. Step 2: Convert to fraction form
    20,842.38/31,254.12 = 7,685.46/x
  3. Step 3: Cross multiply
    20,842.38x = 31,254.12 × 7,685.46
  4. Step 4: Simplify right side
    20,842.38x = 240,202,289.10
  5. Step 5: Solve for x
    x = 240,202,289.10/20,842.38
  6. Step 6: Final answer
    x = 11,524.71

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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.