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Finding the Fourth Proportional to 18,243.76, 25,174.88 and 10,287.94

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Solution

The fourth proportional to 18,243.76, 25,174.88 and 10,287.94 is: 14,196.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,243.76 : 25,174.88 = 10,287.94 : x
  2. Step 2: Convert to fraction form
    18,243.76/25,174.88 = 10,287.94/x
  3. Step 3: Cross multiply
    18,243.76x = 25,174.88 × 10,287.94
  4. Step 4: Simplify right side
    18,243.76x = 258,997,654.95
  5. Step 5: Solve for x
    x = 258,997,654.95/18,243.76
  6. Step 6: Final answer
    x = 14,196.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.