Home / 3,985.13-5,499.78-2,216.87

Finding the Fourth Proportional to 3,985.13, 5,499.78 and 2,216.87

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Solution

The fourth proportional to 3,985.13, 5,499.78 and 2,216.87 is: 3,059.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.13 : 5,499.78 = 2,216.87 : x
  2. Step 2: Convert to fraction form
    3,985.13/5,499.78 = 2,216.87/x
  3. Step 3: Cross multiply
    3,985.13x = 5,499.78 × 2,216.87
  4. Step 4: Simplify right side
    3,985.13x = 12,192,269.79
  5. Step 5: Solve for x
    x = 12,192,269.79/3,985.13
  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.