Home / 5,413.60-8,120.40-3,103.20

Finding the Fourth Proportional to 5,413.60, 8,120.40 and 3,103.20

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Solution

The fourth proportional to 5,413.60, 8,120.40 and 3,103.20 is: 4,654.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,413.60 : 8,120.40 = 3,103.20 : x
  2. Step 2: Convert to fraction form
    5,413.60/8,120.40 = 3,103.20/x
  3. Step 3: Cross multiply
    5,413.60x = 8,120.40 × 3,103.20
  4. Step 4: Simplify right side
    5,413.60x = 25,199,225.28
  5. Step 5: Solve for x
    x = 25,199,225.28/5,413.60
  6. Step 6: Final answer
    x = 4,654.80

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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.