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Finding the Fourth Proportional to 13,600.20, 20,400.30 and 11,413.20

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Solution

The fourth proportional to 13,600.20, 20,400.30 and 11,413.20 is: 17,119.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,600.20 : 20,400.30 = 11,413.20 : x
  2. Step 2: Convert to fraction form
    13,600.20/20,400.30 = 11,413.20/x
  3. Step 3: Cross multiply
    13,600.20x = 20,400.30 × 11,413.20
  4. Step 4: Simplify right side
    13,600.20x = 232,832,703.96
  5. Step 5: Solve for x
    x = 232,832,703.96/13,600.20
  6. Step 6: Final answer
    x = 17,119.80

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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.