Home / 3,945.92-5,918.85-1,313.62

Finding the Fourth Proportional to 3,945.92, 5,918.85 and 1,313.62

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Solution

The fourth proportional to 3,945.92, 5,918.85 and 1,313.62 is: 1,970.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.92 : 5,918.85 = 1,313.62 : x
  2. Step 2: Convert to fraction form
    3,945.92/5,918.85 = 1,313.62/x
  3. Step 3: Cross multiply
    3,945.92x = 5,918.85 × 1,313.62
  4. Step 4: Simplify right side
    3,945.92x = 7,775,119.74
  5. Step 5: Solve for x
    x = 7,775,119.74/3,945.92
  6. Step 6: Final answer
    x = 1,970.42

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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.