Home / 6,399.84-8,831.40-3,605.28

Finding the Fourth Proportional to 6,399.84, 8,831.40 and 3,605.28

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Solution

The fourth proportional to 6,399.84, 8,831.40 and 3,605.28 is: 4,975.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,399.84 : 8,831.40 = 3,605.28 : x
  2. Step 2: Convert to fraction form
    6,399.84/8,831.40 = 3,605.28/x
  3. Step 3: Cross multiply
    6,399.84x = 8,831.40 × 3,605.28
  4. Step 4: Simplify right side
    6,399.84x = 31,839,669.79
  5. Step 5: Solve for x
    x = 31,839,669.79/6,399.84
  6. Step 6: Final answer
    x = 4,975.07

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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.