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Finding the Fourth Proportional to 6,399.66, 8,831.40 and 3,605.16

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Solution

The fourth proportional to 6,399.66, 8,831.40 and 3,605.16 is: 4,975.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,399.66 : 8,831.40 = 3,605.16 : x
  2. Step 2: Convert to fraction form
    6,399.66/8,831.40 = 3,605.16/x
  3. Step 3: Cross multiply
    6,399.66x = 8,831.40 × 3,605.16
  4. Step 4: Simplify right side
    6,399.66x = 31,838,610.02
  5. Step 5: Solve for x
    x = 31,838,610.02/6,399.66
  6. Step 6: Final answer
    x = 4,975.05

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