Home / 20,413.20-28,168.12-11,461.69

Finding the Fourth Proportional to 20,413.20, 28,168.12 and 11,461.69

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Solution

The fourth proportional to 20,413.20, 28,168.12 and 11,461.69 is: 15,815.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,413.20 : 28,168.12 = 11,461.69 : x
  2. Step 2: Convert to fraction form
    20,413.20/28,168.12 = 11,461.69/x
  3. Step 3: Cross multiply
    20,413.20x = 28,168.12 × 11,461.69
  4. Step 4: Simplify right side
    20,413.20x = 322,854,259.32
  5. Step 5: Solve for x
    x = 322,854,259.32/20,413.20
  6. Step 6: Final answer
    x = 15,815.96

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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.