Home / 9,413.28-12,990.80-5,221.44

Finding the Fourth Proportional to 9,413.28, 12,990.80 and 5,221.44

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Solution

The fourth proportional to 9,413.28, 12,990.80 and 5,221.44 is: 7,205.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,413.28 : 12,990.80 = 5,221.44 : x
  2. Step 2: Convert to fraction form
    9,413.28/12,990.80 = 5,221.44/x
  3. Step 3: Cross multiply
    9,413.28x = 12,990.80 × 5,221.44
  4. Step 4: Simplify right side
    9,413.28x = 67,830,682.75
  5. Step 5: Solve for x
    x = 67,830,682.75/9,413.28
  6. Step 6: Final answer
    x = 7,205.85

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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.