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Finding the Fourth Proportional to 18,666.45, 27,979.02 and 7,569.86

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Solution

The fourth proportional to 18,666.45, 27,979.02 and 7,569.86 is: 11,346.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.45 : 27,979.02 = 7,569.86 : x
  2. Step 2: Convert to fraction form
    18,666.45/27,979.02 = 7,569.86/x
  3. Step 3: Cross multiply
    18,666.45x = 27,979.02 × 7,569.86
  4. Step 4: Simplify right side
    18,666.45x = 211,797,124.44
  5. Step 5: Solve for x
    x = 211,797,124.44/18,666.45
  6. Step 6: Final answer
    x = 11,346.41

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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.