Home / 3,945.85-5,918.78-3,705.28

Finding the Fourth Proportional to 3,945.85, 5,918.78 and 3,705.28

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Solution

The fourth proportional to 3,945.85, 5,918.78 and 3,705.28 is: 5,557.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.85 : 5,918.78 = 3,705.28 : x
  2. Step 2: Convert to fraction form
    3,945.85/5,918.78 = 3,705.28/x
  3. Step 3: Cross multiply
    3,945.85x = 5,918.78 × 3,705.28
  4. Step 4: Simplify right side
    3,945.85x = 21,930,737.16
  5. Step 5: Solve for x
    x = 21,930,737.16/3,945.85
  6. Step 6: Final answer
    x = 5,557.92

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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.