Home / 15,449.28-21,318.72-9,160.56

Finding the Fourth Proportional to 15,449.28, 21,318.72 and 9,160.56

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Solution

The fourth proportional to 15,449.28, 21,318.72 and 9,160.56 is: 12,640.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,449.28 : 21,318.72 = 9,160.56 : x
  2. Step 2: Convert to fraction form
    15,449.28/21,318.72 = 9,160.56/x
  3. Step 3: Cross multiply
    15,449.28x = 21,318.72 × 9,160.56
  4. Step 4: Simplify right side
    15,449.28x = 195,291,413.68
  5. Step 5: Solve for x
    x = 195,291,413.68/15,449.28
  6. Step 6: Final answer
    x = 12,640.81

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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.