Home / 20,976.14-31,399.04-15,679.92

Finding the Fourth Proportional to 20,976.14, 31,399.04 and 15,679.92

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Solution

The fourth proportional to 20,976.14, 31,399.04 and 15,679.92 is: 23,471.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,976.14 : 31,399.04 = 15,679.92 : x
  2. Step 2: Convert to fraction form
    20,976.14/31,399.04 = 15,679.92/x
  3. Step 3: Cross multiply
    20,976.14x = 31,399.04 × 15,679.92
  4. Step 4: Simplify right side
    20,976.14x = 492,334,435.28
  5. Step 5: Solve for x
    x = 492,334,435.28/20,976.14
  6. Step 6: Final answer
    x = 23,471.16

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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.