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Finding the Fourth Proportional to 8,918.72, 13,366.50 and 3,647.60

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Solution

The fourth proportional to 8,918.72, 13,366.50 and 3,647.60 is: 5,466.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,918.72 : 13,366.50 = 3,647.60 : x
  2. Step 2: Convert to fraction form
    8,918.72/13,366.50 = 3,647.60/x
  3. Step 3: Cross multiply
    8,918.72x = 13,366.50 × 3,647.60
  4. Step 4: Simplify right side
    8,918.72x = 48,755,645.40
  5. Step 5: Solve for x
    x = 48,755,645.40/8,918.72
  6. Step 6: Final answer
    x = 5,466.66

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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.