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Finding the Fourth Proportional to 8,139.69, 11,232.78 and 4,413.69

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Solution

The fourth proportional to 8,139.69, 11,232.78 and 4,413.69 is: 6,090.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.69 : 11,232.78 = 4,413.69 : x
  2. Step 2: Convert to fraction form
    8,139.69/11,232.78 = 4,413.69/x
  3. Step 3: Cross multiply
    8,139.69x = 11,232.78 × 4,413.69
  4. Step 4: Simplify right side
    8,139.69x = 49,578,008.76
  5. Step 5: Solve for x
    x = 49,578,008.76/8,139.69
  6. Step 6: Final answer
    x = 6,090.90

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.