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Finding the Fourth Proportional to 8,916.78, 13,366.26 and 3,069.40

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Solution

The fourth proportional to 8,916.78, 13,366.26 and 3,069.40 is: 4,601.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,916.78 : 13,366.26 = 3,069.40 : x
  2. Step 2: Convert to fraction form
    8,916.78/13,366.26 = 3,069.40/x
  3. Step 3: Cross multiply
    8,916.78x = 13,366.26 × 3,069.40
  4. Step 4: Simplify right side
    8,916.78x = 41,026,398.44
  5. Step 5: Solve for x
    x = 41,026,398.44/8,916.78
  6. Step 6: Final answer
    x = 4,601.03

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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.