Home / 3,877.20-5,355.05-2,556.90

Finding the Fourth Proportional to 3,877.20, 5,355.05 and 2,556.90

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Solution

The fourth proportional to 3,877.20, 5,355.05 and 2,556.90 is: 3,531.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,877.20 : 5,355.05 = 2,556.90 : x
  2. Step 2: Convert to fraction form
    3,877.20/5,355.05 = 2,556.90/x
  3. Step 3: Cross multiply
    3,877.20x = 5,355.05 × 2,556.90
  4. Step 4: Simplify right side
    3,877.20x = 13,692,314.56
  5. Step 5: Solve for x
    x = 13,692,314.56/3,877.20
  6. Step 6: Final answer
    x = 3,531.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.