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Finding the Fourth Proportional to 6,991.47, 9,648.15 and 3,967.15

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Solution

The fourth proportional to 6,991.47, 9,648.15 and 3,967.15 is: 5,474.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.47 : 9,648.15 = 3,967.15 : x
  2. Step 2: Convert to fraction form
    6,991.47/9,648.15 = 3,967.15/x
  3. Step 3: Cross multiply
    6,991.47x = 9,648.15 × 3,967.15
  4. Step 4: Simplify right side
    6,991.47x = 38,275,610.03
  5. Step 5: Solve for x
    x = 38,275,610.03/6,991.47
  6. Step 6: Final answer
    x = 5,474.62

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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.