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Finding the Fourth Proportional to 8,291.40, 12,441.15 and 3,908.10

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Solution

The fourth proportional to 8,291.40, 12,441.15 and 3,908.10 is: 5,864.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,291.40 : 12,441.15 = 3,908.10 : x
  2. Step 2: Convert to fraction form
    8,291.40/12,441.15 = 3,908.10/x
  3. Step 3: Cross multiply
    8,291.40x = 12,441.15 × 3,908.10
  4. Step 4: Simplify right side
    8,291.40x = 48,621,258.32
  5. Step 5: Solve for x
    x = 48,621,258.32/8,291.40
  6. Step 6: Final answer
    x = 5,864.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.