Home / 8,989.84-12,413.62-5,638.26

Finding the Fourth Proportional to 8,989.84, 12,413.62 and 5,638.26

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Solution

The fourth proportional to 8,989.84, 12,413.62 and 5,638.26 is: 7,785.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.84 : 12,413.62 = 5,638.26 : x
  2. Step 2: Convert to fraction form
    8,989.84/12,413.62 = 5,638.26/x
  3. Step 3: Cross multiply
    8,989.84x = 12,413.62 × 5,638.26
  4. Step 4: Simplify right side
    8,989.84x = 69,991,217.10
  5. Step 5: Solve for x
    x = 69,991,217.10/8,989.84
  6. Step 6: Final answer
    x = 7,785.59

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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.