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Finding the Fourth Proportional to 6,920.81, 9,549.92 and 3,936.02

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Solution

The fourth proportional to 6,920.81, 9,549.92 and 3,936.02 is: 5,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.81 : 9,549.92 = 3,936.02 : x
  2. Step 2: Convert to fraction form
    6,920.81/9,549.92 = 3,936.02/x
  3. Step 3: Cross multiply
    6,920.81x = 9,549.92 × 3,936.02
  4. Step 4: Simplify right side
    6,920.81x = 37,588,608.69
  5. Step 5: Solve for x
    x = 37,588,608.69/6,920.81
  6. Step 6: Final answer
    x = 5,431.25

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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.