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Finding the Fourth Proportional to 18,135.92, 27,211.44 and 7,607.90

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Solution

The fourth proportional to 18,135.92, 27,211.44 and 7,607.90 is: 11,415.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,135.92 : 27,211.44 = 7,607.90 : x
  2. Step 2: Convert to fraction form
    18,135.92/27,211.44 = 7,607.90/x
  3. Step 3: Cross multiply
    18,135.92x = 27,211.44 × 7,607.90
  4. Step 4: Simplify right side
    18,135.92x = 207,021,914.38
  5. Step 5: Solve for x
    x = 207,021,914.38/18,135.92
  6. Step 6: Final answer
    x = 11,415.02

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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.