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Finding the Fourth Proportional to 8,681.10, 13,021.72 and 2,107.29

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Solution

The fourth proportional to 8,681.10, 13,021.72 and 2,107.29 is: 3,160.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,681.10 : 13,021.72 = 2,107.29 : x
  2. Step 2: Convert to fraction form
    8,681.10/13,021.72 = 2,107.29/x
  3. Step 3: Cross multiply
    8,681.10x = 13,021.72 × 2,107.29
  4. Step 4: Simplify right side
    8,681.10x = 27,440,540.34
  5. Step 5: Solve for x
    x = 27,440,540.34/8,681.10
  6. Step 6: Final answer
    x = 3,160.95

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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.