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Finding the Fourth Proportional to 8,999.43, 12,417.78 and 5,413.53

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Solution

The fourth proportional to 8,999.43, 12,417.78 and 5,413.53 is: 7,469.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,999.43 : 12,417.78 = 5,413.53 : x
  2. Step 2: Convert to fraction form
    8,999.43/12,417.78 = 5,413.53/x
  3. Step 3: Cross multiply
    8,999.43x = 12,417.78 × 5,413.53
  4. Step 4: Simplify right side
    8,999.43x = 67,224,024.56
  5. Step 5: Solve for x
    x = 67,224,024.56/8,999.43
  6. Step 6: Final answer
    x = 7,469.81

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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.