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Finding the Fourth Proportional to 7,236.32, 9,986.16 and 4,092.80

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Solution

The fourth proportional to 7,236.32, 9,986.16 and 4,092.80 is: 5,648.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,236.32 : 9,986.16 = 4,092.80 : x
  2. Step 2: Convert to fraction form
    7,236.32/9,986.16 = 4,092.80/x
  3. Step 3: Cross multiply
    7,236.32x = 9,986.16 × 4,092.80
  4. Step 4: Simplify right side
    7,236.32x = 40,871,355.65
  5. Step 5: Solve for x
    x = 40,871,355.65/7,236.32
  6. Step 6: Final answer
    x = 5,648.09

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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.