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Finding the Fourth Proportional to 7,086.96, 9,780.48 and 3,943.16

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Solution

The fourth proportional to 7,086.96, 9,780.48 and 3,943.16 is: 5,441.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,086.96 : 9,780.48 = 3,943.16 : x
  2. Step 2: Convert to fraction form
    7,086.96/9,780.48 = 3,943.16/x
  3. Step 3: Cross multiply
    7,086.96x = 9,780.48 × 3,943.16
  4. Step 4: Simplify right side
    7,086.96x = 38,565,997.52
  5. Step 5: Solve for x
    x = 38,565,997.52/7,086.96
  6. Step 6: Final answer
    x = 5,441.83

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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.