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Finding the Fourth Proportional to 7,413.21, 11,124.41 and 6,721.16

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Solution

The fourth proportional to 7,413.21, 11,124.41 and 6,721.16 is: 10,085.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,413.21 : 11,124.41 = 6,721.16 : x
  2. Step 2: Convert to fraction form
    7,413.21/11,124.41 = 6,721.16/x
  3. Step 3: Cross multiply
    7,413.21x = 11,124.41 × 6,721.16
  4. Step 4: Simplify right side
    7,413.21x = 74,768,850.29
  5. Step 5: Solve for x
    x = 74,768,850.29/7,413.21
  6. Step 6: Final answer
    x = 10,085.89

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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.