Home / 5,147.12-7,720.68-2,831.60

Finding the Fourth Proportional to 5,147.12, 7,720.68 and 2,831.60

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Solution

The fourth proportional to 5,147.12, 7,720.68 and 2,831.60 is: 4,247.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,147.12 : 7,720.68 = 2,831.60 : x
  2. Step 2: Convert to fraction form
    5,147.12/7,720.68 = 2,831.60/x
  3. Step 3: Cross multiply
    5,147.12x = 7,720.68 × 2,831.60
  4. Step 4: Simplify right side
    5,147.12x = 21,861,877.49
  5. Step 5: Solve for x
    x = 21,861,877.49/5,147.12
  6. Step 6: Final answer
    x = 4,247.40

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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.