Home / 20,560.80-30,841.20-7,413.60

Finding the Fourth Proportional to 20,560.80, 30,841.20 and 7,413.60

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Solution

The fourth proportional to 20,560.80, 30,841.20 and 7,413.60 is: 11,120.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,560.80 : 30,841.20 = 7,413.60 : x
  2. Step 2: Convert to fraction form
    20,560.80/30,841.20 = 7,413.60/x
  3. Step 3: Cross multiply
    20,560.80x = 30,841.20 × 7,413.60
  4. Step 4: Simplify right side
    20,560.80x = 228,644,320.32
  5. Step 5: Solve for x
    x = 228,644,320.32/20,560.80
  6. Step 6: Final answer
    x = 11,120.40

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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.