Home / 12,375.40-18,565.80-3,609.60

Finding the Fourth Proportional to 12,375.40, 18,565.80 and 3,609.60

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Solution

The fourth proportional to 12,375.40, 18,565.80 and 3,609.60 is: 5,415.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,375.40 : 18,565.80 = 3,609.60 : x
  2. Step 2: Convert to fraction form
    12,375.40/18,565.80 = 3,609.60/x
  3. Step 3: Cross multiply
    12,375.40x = 18,565.80 × 3,609.60
  4. Step 4: Simplify right side
    12,375.40x = 67,015,111.68
  5. Step 5: Solve for x
    x = 67,015,111.68/12,375.40
  6. Step 6: Final answer
    x = 5,415.19

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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.