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Finding the Fourth Proportional to 18,111.98, 27,156.29 and 7,579.15

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Solution

The fourth proportional to 18,111.98, 27,156.29 and 7,579.15 is: 11,363.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,111.98 : 27,156.29 = 7,579.15 : x
  2. Step 2: Convert to fraction form
    18,111.98/27,156.29 = 7,579.15/x
  3. Step 3: Cross multiply
    18,111.98x = 27,156.29 × 7,579.15
  4. Step 4: Simplify right side
    18,111.98x = 205,821,489.57
  5. Step 5: Solve for x
    x = 205,821,489.57/18,111.98
  6. Step 6: Final answer
    x = 11,363.83

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1.5x scale

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.