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Finding the Fourth Proportional to 11,172.03, 15,413.11 and 6,391

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Solution

The fourth proportional to 11,172.03, 15,413.11 and 6,391 is: 8,817.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,172.03 : 15,413.11 = 6,391 : x
  2. Step 2: Convert to fraction form
    11,172.03/15,413.11 = 6,391/x
  3. Step 3: Cross multiply
    11,172.03x = 15,413.11 × 6,391
  4. Step 4: Simplify right side
    11,172.03x = 98,505,154.06
  5. Step 5: Solve for x
    x = 98,505,154.06/11,172.03
  6. Step 6: Final answer
    x = 8,817.13

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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.