Home / 11,987.62-17,983.70-5,413.78

Finding the Fourth Proportional to 11,987.62, 17,983.70 and 5,413.78

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Solution

The fourth proportional to 11,987.62, 17,983.70 and 5,413.78 is: 8,121.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.62 : 17,983.70 = 5,413.78 : x
  2. Step 2: Convert to fraction form
    11,987.62/17,983.70 = 5,413.78/x
  3. Step 3: Cross multiply
    11,987.62x = 17,983.70 × 5,413.78
  4. Step 4: Simplify right side
    11,987.62x = 97,359,795.39
  5. Step 5: Solve for x
    x = 97,359,795.39/11,987.62
  6. Step 6: Final answer
    x = 8,121.70

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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.