Home / 9,413.40-12,990.51-5,221.65

Finding the Fourth Proportional to 9,413.40, 12,990.51 and 5,221.65

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Solution

The fourth proportional to 9,413.40, 12,990.51 and 5,221.65 is: 7,205.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,413.40 : 12,990.51 = 5,221.65 : x
  2. Step 2: Convert to fraction form
    9,413.40/12,990.51 = 5,221.65/x
  3. Step 3: Cross multiply
    9,413.40x = 12,990.51 × 5,221.65
  4. Step 4: Simplify right side
    9,413.40x = 67,831,896.54
  5. Step 5: Solve for x
    x = 67,831,896.54/9,413.40
  6. Step 6: Final answer
    x = 7,205.89

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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.