Home / 3,985.53-5,499.78-2,217.09

Finding the Fourth Proportional to 3,985.53, 5,499.78 and 2,217.09

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Solution

The fourth proportional to 3,985.53, 5,499.78 and 2,217.09 is: 3,059.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.53 : 5,499.78 = 2,217.09 : x
  2. Step 2: Convert to fraction form
    3,985.53/5,499.78 = 2,217.09/x
  3. Step 3: Cross multiply
    3,985.53x = 5,499.78 × 2,217.09
  4. Step 4: Simplify right side
    3,985.53x = 12,193,507.24
  5. Step 5: Solve for x
    x = 12,193,507.24/3,985.53
  6. Step 6: Final answer
    x = 3,059.44

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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.