Home / 38,478.40-57,766.20-20,723.20

Finding the Fourth Proportional to 38,478.40, 57,766.20 and 20,723.20

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Solution

The fourth proportional to 38,478.40, 57,766.20 and 20,723.20 is: 31,110.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,478.40 : 57,766.20 = 20,723.20 : x
  2. Step 2: Convert to fraction form
    38,478.40/57,766.20 = 20,723.20/x
  3. Step 3: Cross multiply
    38,478.40x = 57,766.20 × 20,723.20
  4. Step 4: Simplify right side
    38,478.40x = 1,197,100,515.84
  5. Step 5: Solve for x
    x = 1,197,100,515.84/38,478.40
  6. Step 6: Final answer
    x = 31,110.97

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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.