Home / 3,918.40-5,877.60-3,860.80

Finding the Fourth Proportional to 3,918.40, 5,877.60 and 3,860.80

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Solution

The fourth proportional to 3,918.40, 5,877.60 and 3,860.80 is: 5,791.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.40 : 5,877.60 = 3,860.80 : x
  2. Step 2: Convert to fraction form
    3,918.40/5,877.60 = 3,860.80/x
  3. Step 3: Cross multiply
    3,918.40x = 5,877.60 × 3,860.80
  4. Step 4: Simplify right side
    3,918.40x = 22,692,238.08
  5. Step 5: Solve for x
    x = 22,692,238.08/3,918.40
  6. Step 6: Final answer
    x = 5,791.20

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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.