Home / 10,380.20-14,324.58-6,399.72

Finding the Fourth Proportional to 10,380.20, 14,324.58 and 6,399.72

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Solution

The fourth proportional to 10,380.20, 14,324.58 and 6,399.72 is: 8,831.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,380.20 : 14,324.58 = 6,399.72 : x
  2. Step 2: Convert to fraction form
    10,380.20/14,324.58 = 6,399.72/x
  3. Step 3: Cross multiply
    10,380.20x = 14,324.58 × 6,399.72
  4. Step 4: Simplify right side
    10,380.20x = 91,673,301.12
  5. Step 5: Solve for x
    x = 91,673,301.12/10,380.20
  6. Step 6: Final answer
    x = 8,831.55

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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.