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Finding the Fourth Proportional to 39,413.67, 54,392.01 and 21,509.82

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Solution

The fourth proportional to 39,413.67, 54,392.01 and 21,509.82 is: 29,684.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,413.67 : 54,392.01 = 21,509.82 : x
  2. Step 2: Convert to fraction form
    39,413.67/54,392.01 = 21,509.82/x
  3. Step 3: Cross multiply
    39,413.67x = 54,392.01 × 21,509.82
  4. Step 4: Simplify right side
    39,413.67x = 1,169,962,344.54
  5. Step 5: Solve for x
    x = 1,169,962,344.54/39,413.67
  6. Step 6: Final answer
    x = 29,684.18

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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.