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Finding the Fourth Proportional to 18,666.63, 27,985.87 and 11,269.33

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Solution

The fourth proportional to 18,666.63, 27,985.87 and 11,269.33 is: 16,895.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,666.63 : 27,985.87 = 11,269.33 : x
  2. Step 2: Convert to fraction form
    18,666.63/27,985.87 = 11,269.33/x
  3. Step 3: Cross multiply
    18,666.63x = 27,985.87 × 11,269.33
  4. Step 4: Simplify right side
    18,666.63x = 315,382,011.18
  5. Step 5: Solve for x
    x = 315,382,011.18/18,666.63
  6. Step 6: Final answer
    x = 16,895.50

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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.