Home / 12,919.49-17,831.37-8,387.85

Finding the Fourth Proportional to 12,919.49, 17,831.37 and 8,387.85

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Solution

The fourth proportional to 12,919.49, 17,831.37 and 8,387.85 is: 11,576.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,919.49 : 17,831.37 = 8,387.85 : x
  2. Step 2: Convert to fraction form
    12,919.49/17,831.37 = 8,387.85/x
  3. Step 3: Cross multiply
    12,919.49x = 17,831.37 × 8,387.85
  4. Step 4: Simplify right side
    12,919.49x = 149,566,856.85
  5. Step 5: Solve for x
    x = 149,566,856.85/12,919.49
  6. Step 6: Final answer
    x = 11,576.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.