Home / 3,985.20-5,500.08-2,217.60

Finding the Fourth Proportional to 3,985.20, 5,500.08 and 2,217.60

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Solution

The fourth proportional to 3,985.20, 5,500.08 and 2,217.60 is: 3,060.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.20 : 5,500.08 = 2,217.60 : x
  2. Step 2: Convert to fraction form
    3,985.20/5,500.08 = 2,217.60/x
  3. Step 3: Cross multiply
    3,985.20x = 5,500.08 × 2,217.60
  4. Step 4: Simplify right side
    3,985.20x = 12,196,977.41
  5. Step 5: Solve for x
    x = 12,196,977.41/3,985.20
  6. Step 6: Final answer
    x = 3,060.57

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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.