Home / 12,125.76-18,188.56-3,119.86

Finding the Fourth Proportional to 12,125.76, 18,188.56 and 3,119.86

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Solution

The fourth proportional to 12,125.76, 18,188.56 and 3,119.86 is: 4,679.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,125.76 : 18,188.56 = 3,119.86 : x
  2. Step 2: Convert to fraction form
    12,125.76/18,188.56 = 3,119.86/x
  3. Step 3: Cross multiply
    12,125.76x = 18,188.56 × 3,119.86
  4. Step 4: Simplify right side
    12,125.76x = 56,745,760.80
  5. Step 5: Solve for x
    x = 56,745,760.80/12,125.76
  6. Step 6: Final answer
    x = 4,679.77

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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.