Home / 11,989.06-17,981.55-5,413.70

Finding the Fourth Proportional to 11,989.06, 17,981.55 and 5,413.70

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Solution

The fourth proportional to 11,989.06, 17,981.55 and 5,413.70 is: 8,119.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,989.06 : 17,981.55 = 5,413.70 : x
  2. Step 2: Convert to fraction form
    11,989.06/17,981.55 = 5,413.70/x
  3. Step 3: Cross multiply
    11,989.06x = 17,981.55 × 5,413.70
  4. Step 4: Simplify right side
    11,989.06x = 97,346,762.19
  5. Step 5: Solve for x
    x = 97,346,762.19/11,989.06
  6. Step 6: Final answer
    x = 8,119.63

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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.