Home / 12,409.20-18,615.60-4,087.80

Finding the Fourth Proportional to 12,409.20, 18,615.60 and 4,087.80

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Solution

The fourth proportional to 12,409.20, 18,615.60 and 4,087.80 is: 6,132.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,409.20 : 18,615.60 = 4,087.80 : x
  2. Step 2: Convert to fraction form
    12,409.20/18,615.60 = 4,087.80/x
  3. Step 3: Cross multiply
    12,409.20x = 18,615.60 × 4,087.80
  4. Step 4: Simplify right side
    12,409.20x = 76,096,849.68
  5. Step 5: Solve for x
    x = 76,096,849.68/12,409.20
  6. Step 6: Final answer
    x = 6,132.29

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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.