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Finding the Fourth Proportional to 8,910.30, 13,361.40 and 3,977.40

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Solution

The fourth proportional to 8,910.30, 13,361.40 and 3,977.40 is: 5,964.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,910.30 : 13,361.40 = 3,977.40 : x
  2. Step 2: Convert to fraction form
    8,910.30/13,361.40 = 3,977.40/x
  3. Step 3: Cross multiply
    8,910.30x = 13,361.40 × 3,977.40
  4. Step 4: Simplify right side
    8,910.30x = 53,143,632.36
  5. Step 5: Solve for x
    x = 53,143,632.36/8,910.30
  6. Step 6: Final answer
    x = 5,964.29

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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.