Home / 8,076.15-12,119.75-3,145.81

Finding the Fourth Proportional to 8,076.15, 12,119.75 and 3,145.81

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Solution

The fourth proportional to 8,076.15, 12,119.75 and 3,145.81 is: 4,720.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,076.15 : 12,119.75 = 3,145.81 : x
  2. Step 2: Convert to fraction form
    8,076.15/12,119.75 = 3,145.81/x
  3. Step 3: Cross multiply
    8,076.15x = 12,119.75 × 3,145.81
  4. Step 4: Simplify right side
    8,076.15x = 38,126,430.75
  5. Step 5: Solve for x
    x = 38,126,430.75/8,076.15
  6. Step 6: Final answer
    x = 4,720.87

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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.