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Finding the Fourth Proportional to 18,466.61, 27,701.15 and 5,319.09

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Solution

The fourth proportional to 18,466.61, 27,701.15 and 5,319.09 is: 7,978.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,466.61 : 27,701.15 = 5,319.09 : x
  2. Step 2: Convert to fraction form
    18,466.61/27,701.15 = 5,319.09/x
  3. Step 3: Cross multiply
    18,466.61x = 27,701.15 × 5,319.09
  4. Step 4: Simplify right side
    18,466.61x = 147,344,883.36
  5. Step 5: Solve for x
    x = 147,344,883.36/18,466.61
  6. Step 6: Final answer
    x = 7,978.99

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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.