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Finding the Fourth Proportional to 18,143.30, 27,219.86 and 7,607.78

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Solution

The fourth proportional to 18,143.30, 27,219.86 and 7,607.78 is: 11,413.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,143.30 : 27,219.86 = 7,607.78 : x
  2. Step 2: Convert to fraction form
    18,143.30/27,219.86 = 7,607.78/x
  3. Step 3: Cross multiply
    18,143.30x = 27,219.86 × 7,607.78
  4. Step 4: Simplify right side
    18,143.30x = 207,082,532.37
  5. Step 5: Solve for x
    x = 207,082,532.37/18,143.30
  6. Step 6: Final answer
    x = 11,413.72

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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.