Home / 12,218.40-18,325.80-3,454.20

Finding the Fourth Proportional to 12,218.40, 18,325.80 and 3,454.20

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Solution

The fourth proportional to 12,218.40, 18,325.80 and 3,454.20 is: 5,180.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,218.40 : 18,325.80 = 3,454.20 : x
  2. Step 2: Convert to fraction form
    12,218.40/18,325.80 = 3,454.20/x
  3. Step 3: Cross multiply
    12,218.40x = 18,325.80 × 3,454.20
  4. Step 4: Simplify right side
    12,218.40x = 63,300,978.36
  5. Step 5: Solve for x
    x = 63,300,978.36/12,218.40
  6. Step 6: Final answer
    x = 5,180.79

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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.