Home / 12,409.60-18,610.80-4,090.72

Finding the Fourth Proportional to 12,409.60, 18,610.80 and 4,090.72

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Solution

The fourth proportional to 12,409.60, 18,610.80 and 4,090.72 is: 6,134.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,409.60 : 18,610.80 = 4,090.72 : x
  2. Step 2: Convert to fraction form
    12,409.60/18,610.80 = 4,090.72/x
  3. Step 3: Cross multiply
    12,409.60x = 18,610.80 × 4,090.72
  4. Step 4: Simplify right side
    12,409.60x = 76,131,571.78
  5. Step 5: Solve for x
    x = 76,131,571.78/12,409.60
  6. Step 6: Final answer
    x = 6,134.89

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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.