Home / 3,985.81-5,500.31-2,217.38

Finding the Fourth Proportional to 3,985.81, 5,500.31 and 2,217.38

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Solution

The fourth proportional to 3,985.81, 5,500.31 and 2,217.38 is: 3,059.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.81 : 5,500.31 = 2,217.38 : x
  2. Step 2: Convert to fraction form
    3,985.81/5,500.31 = 2,217.38/x
  3. Step 3: Cross multiply
    3,985.81x = 5,500.31 × 2,217.38
  4. Step 4: Simplify right side
    3,985.81x = 12,196,238.80
  5. Step 5: Solve for x
    x = 12,196,238.80/3,985.81
  6. Step 6: Final answer
    x = 3,059.92

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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.