Home / 3,985.12-5,499.64-2,216.76

Finding the Fourth Proportional to 3,985.12, 5,499.64 and 2,216.76

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Solution

The fourth proportional to 3,985.12, 5,499.64 and 2,216.76 is: 3,059.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.12 : 5,499.64 = 2,216.76 : x
  2. Step 2: Convert to fraction form
    3,985.12/5,499.64 = 2,216.76/x
  3. Step 3: Cross multiply
    3,985.12x = 5,499.64 × 2,216.76
  4. Step 4: Simplify right side
    3,985.12x = 12,191,381.97
  5. Step 5: Solve for x
    x = 12,191,381.97/3,985.12
  6. Step 6: Final answer
    x = 3,059.23

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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.