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Finding the Fourth Proportional to 18,088.90, 27,138 and 6,992.70

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Solution

The fourth proportional to 18,088.90, 27,138 and 6,992.70 is: 10,490.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,088.90 : 27,138 = 6,992.70 : x
  2. Step 2: Convert to fraction form
    18,088.90/27,138 = 6,992.70/x
  3. Step 3: Cross multiply
    18,088.90x = 27,138 × 6,992.70
  4. Step 4: Simplify right side
    18,088.90x = 189,767,892.60
  5. Step 5: Solve for x
    x = 189,767,892.60/18,088.90
  6. Step 6: Final answer
    x = 10,490.85

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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.