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Finding the Fourth Proportional to 18,356.23, 27,543.48 and 7,270.90

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Solution

The fourth proportional to 18,356.23, 27,543.48 and 7,270.90 is: 10,909.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,356.23 : 27,543.48 = 7,270.90 : x
  2. Step 2: Convert to fraction form
    18,356.23/27,543.48 = 7,270.90/x
  3. Step 3: Cross multiply
    18,356.23x = 27,543.48 × 7,270.90
  4. Step 4: Simplify right side
    18,356.23x = 200,266,008.89
  5. Step 5: Solve for x
    x = 200,266,008.89/18,356.23
  6. Step 6: Final answer
    x = 10,909.98

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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.