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Finding the Fourth Proportional to 18,663.50, 27,995.09 and 7,567.55

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Solution

The fourth proportional to 18,663.50, 27,995.09 and 7,567.55 is: 11,351.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663.50 : 27,995.09 = 7,567.55 : x
  2. Step 2: Convert to fraction form
    18,663.50/27,995.09 = 7,567.55/x
  3. Step 3: Cross multiply
    18,663.50x = 27,995.09 × 7,567.55
  4. Step 4: Simplify right side
    18,663.50x = 211,854,065.52
  5. Step 5: Solve for x
    x = 211,854,065.52/18,663.50
  6. Step 6: Final answer
    x = 11,351.25

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Double scale
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Similar ratio
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1.5x scale

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.