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Finding the Fourth Proportional to 8,817.55, 13,217.10 and 2,972.14

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Solution

The fourth proportional to 8,817.55, 13,217.10 and 2,972.14 is: 4,455.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,817.55 : 13,217.10 = 2,972.14 : x
  2. Step 2: Convert to fraction form
    8,817.55/13,217.10 = 2,972.14/x
  3. Step 3: Cross multiply
    8,817.55x = 13,217.10 × 2,972.14
  4. Step 4: Simplify right side
    8,817.55x = 39,283,071.59
  5. Step 5: Solve for x
    x = 39,283,071.59/8,817.55
  6. Step 6: Final answer
    x = 4,455.10

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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.