Home / 20,724.60-31,119.30-11,976.60

Finding the Fourth Proportional to 20,724.60, 31,119.30 and 11,976.60

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Solution

The fourth proportional to 20,724.60, 31,119.30 and 11,976.60 is: 17,983.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.60 : 31,119.30 = 11,976.60 : x
  2. Step 2: Convert to fraction form
    20,724.60/31,119.30 = 11,976.60/x
  3. Step 3: Cross multiply
    20,724.60x = 31,119.30 × 11,976.60
  4. Step 4: Simplify right side
    20,724.60x = 372,703,408.38
  5. Step 5: Solve for x
    x = 372,703,408.38/20,724.60
  6. Step 6: Final answer
    x = 17,983.62

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1.5x scale

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.