Home / 6,643.27-9,167.78-3,990.16

Finding the Fourth Proportional to 6,643.27, 9,167.78 and 3,990.16

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Solution

The fourth proportional to 6,643.27, 9,167.78 and 3,990.16 is: 5,506.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,643.27 : 9,167.78 = 3,990.16 : x
  2. Step 2: Convert to fraction form
    6,643.27/9,167.78 = 3,990.16/x
  3. Step 3: Cross multiply
    6,643.27x = 9,167.78 × 3,990.16
  4. Step 4: Simplify right side
    6,643.27x = 36,580,930.48
  5. Step 5: Solve for x
    x = 36,580,930.48/6,643.27
  6. Step 6: Final answer
    x = 5,506.47

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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.