Home / 13,413.20-20,119.80-4,648.40

Finding the Fourth Proportional to 13,413.20, 20,119.80 and 4,648.40

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Solution

The fourth proportional to 13,413.20, 20,119.80 and 4,648.40 is: 6,972.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,413.20 : 20,119.80 = 4,648.40 : x
  2. Step 2: Convert to fraction form
    13,413.20/20,119.80 = 4,648.40/x
  3. Step 3: Cross multiply
    13,413.20x = 20,119.80 × 4,648.40
  4. Step 4: Simplify right side
    13,413.20x = 93,524,878.32
  5. Step 5: Solve for x
    x = 93,524,878.32/13,413.20
  6. Step 6: Final answer
    x = 6,972.60

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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.