Home / 3,922.65-5,413.02-2,154.21

Finding the Fourth Proportional to 3,922.65, 5,413.02 and 2,154.21

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Solution

The fourth proportional to 3,922.65, 5,413.02 and 2,154.21 is: 2,972.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.65 : 5,413.02 = 2,154.21 : x
  2. Step 2: Convert to fraction form
    3,922.65/5,413.02 = 2,154.21/x
  3. Step 3: Cross multiply
    3,922.65x = 5,413.02 × 2,154.21
  4. Step 4: Simplify right side
    3,922.65x = 11,660,781.81
  5. Step 5: Solve for x
    x = 11,660,781.81/3,922.65
  6. Step 6: Final answer
    x = 2,972.68

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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.