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Finding the Fourth Proportional to 18,855, 28,270.02 and 8,995.80

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Solution

The fourth proportional to 18,855, 28,270.02 and 8,995.80 is: 13,487.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855 : 28,270.02 = 8,995.80 : x
  2. Step 2: Convert to fraction form
    18,855/28,270.02 = 8,995.80/x
  3. Step 3: Cross multiply
    18,855x = 28,270.02 × 8,995.80
  4. Step 4: Simplify right side
    18,855x = 254,311,445.92
  5. Step 5: Solve for x
    x = 254,311,445.92/18,855
  6. Step 6: Final answer
    x = 13,487.75

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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.