Home / 38,449.84-57,693.20-20,919.64

Finding the Fourth Proportional to 38,449.84, 57,693.20 and 20,919.64

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Solution

The fourth proportional to 38,449.84, 57,693.20 and 20,919.64 is: 31,389.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,449.84 : 57,693.20 = 20,919.64 : x
  2. Step 2: Convert to fraction form
    38,449.84/57,693.20 = 20,919.64/x
  3. Step 3: Cross multiply
    38,449.84x = 57,693.20 × 20,919.64
  4. Step 4: Simplify right side
    38,449.84x = 1,206,920,974.45
  5. Step 5: Solve for x
    x = 1,206,920,974.45/38,449.84
  6. Step 6: Final answer
    x = 31,389.49

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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.