Home / 3,989.74-5,979.33-3,061.75

Finding the Fourth Proportional to 3,989.74, 5,979.33 and 3,061.75

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Solution

The fourth proportional to 3,989.74, 5,979.33 and 3,061.75 is: 4,588.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.74 : 5,979.33 = 3,061.75 : x
  2. Step 2: Convert to fraction form
    3,989.74/5,979.33 = 3,061.75/x
  3. Step 3: Cross multiply
    3,989.74x = 5,979.33 × 3,061.75
  4. Step 4: Simplify right side
    3,989.74x = 18,307,213.63
  5. Step 5: Solve for x
    x = 18,307,213.63/3,989.74
  6. Step 6: Final answer
    x = 4,588.57

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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.