Home / 20,724.96-28,599.12-11,771.76

Finding the Fourth Proportional to 20,724.96, 28,599.12 and 11,771.76

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Solution

The fourth proportional to 20,724.96, 28,599.12 and 11,771.76 is: 16,244.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,724.96 : 28,599.12 = 11,771.76 : x
  2. Step 2: Convert to fraction form
    20,724.96/28,599.12 = 11,771.76/x
  3. Step 3: Cross multiply
    20,724.96x = 28,599.12 × 11,771.76
  4. Step 4: Simplify right side
    20,724.96x = 336,661,976.85
  5. Step 5: Solve for x
    x = 336,661,976.85/20,724.96
  6. Step 6: Final answer
    x = 16,244.28

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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.