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Finding the Fourth Proportional to 18,608.80, 27,916.80 and 8,220.52

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Solution

The fourth proportional to 18,608.80, 27,916.80 and 8,220.52 is: 12,332.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,608.80 : 27,916.80 = 8,220.52 : x
  2. Step 2: Convert to fraction form
    18,608.80/27,916.80 = 8,220.52/x
  3. Step 3: Cross multiply
    18,608.80x = 27,916.80 × 8,220.52
  4. Step 4: Simplify right side
    18,608.80x = 229,490,612.74
  5. Step 5: Solve for x
    x = 229,490,612.74/18,608.80
  6. Step 6: Final answer
    x = 12,332.37

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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.