Home / 3,931.60-5,918.80-3,395.92

Finding the Fourth Proportional to 3,931.60, 5,918.80 and 3,395.92

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Solution

The fourth proportional to 3,931.60, 5,918.80 and 3,395.92 is: 5,112.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,931.60 : 5,918.80 = 3,395.92 : x
  2. Step 2: Convert to fraction form
    3,931.60/5,918.80 = 3,395.92/x
  3. Step 3: Cross multiply
    3,931.60x = 5,918.80 × 3,395.92
  4. Step 4: Simplify right side
    3,931.60x = 20,099,771.30
  5. Step 5: Solve for x
    x = 20,099,771.30/3,931.60
  6. Step 6: Final answer
    x = 5,112.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.