Home / 3,985.65-5,500.40-2,217.42

Finding the Fourth Proportional to 3,985.65, 5,500.40 and 2,217.42

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Solution

The fourth proportional to 3,985.65, 5,500.40 and 2,217.42 is: 3,060.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.65 : 5,500.40 = 2,217.42 : x
  2. Step 2: Convert to fraction form
    3,985.65/5,500.40 = 2,217.42/x
  3. Step 3: Cross multiply
    3,985.65x = 5,500.40 × 2,217.42
  4. Step 4: Simplify right side
    3,985.65x = 12,196,685.88
  5. Step 5: Solve for x
    x = 12,196,685.88/3,985.65
  6. Step 6: Final answer
    x = 3,060.15

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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.