Home / 12,216.40-18,322.80-3,452.20

Finding the Fourth Proportional to 12,216.40, 18,322.80 and 3,452.20

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Solution

The fourth proportional to 12,216.40, 18,322.80 and 3,452.20 is: 5,177.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,216.40 : 18,322.80 = 3,452.20 : x
  2. Step 2: Convert to fraction form
    12,216.40/18,322.80 = 3,452.20/x
  3. Step 3: Cross multiply
    12,216.40x = 18,322.80 × 3,452.20
  4. Step 4: Simplify right side
    12,216.40x = 63,253,970.16
  5. Step 5: Solve for x
    x = 63,253,970.16/12,216.40
  6. Step 6: Final answer
    x = 5,177.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.