Home / 6,399.60-8,831.44-3,605.12

Finding the Fourth Proportional to 6,399.60, 8,831.44 and 3,605.12

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Solution

The fourth proportional to 6,399.60, 8,831.44 and 3,605.12 is: 4,975.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,399.60 : 8,831.44 = 3,605.12 : x
  2. Step 2: Convert to fraction form
    6,399.60/8,831.44 = 3,605.12/x
  3. Step 3: Cross multiply
    6,399.60x = 8,831.44 × 3,605.12
  4. Step 4: Simplify right side
    6,399.60x = 31,838,400.97
  5. Step 5: Solve for x
    x = 31,838,400.97/6,399.60
  6. Step 6: Final answer
    x = 4,975.06

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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.