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Finding the Fourth Proportional to 20,924.50, 31,391.62 and 7,073.50

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Solution

The fourth proportional to 20,924.50, 31,391.62 and 7,073.50 is: 10,611.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,924.50 : 31,391.62 = 7,073.50 : x
  2. Step 2: Convert to fraction form
    20,924.50/31,391.62 = 7,073.50/x
  3. Step 3: Cross multiply
    20,924.50x = 31,391.62 × 7,073.50
  4. Step 4: Simplify right side
    20,924.50x = 222,048,624.07
  5. Step 5: Solve for x
    x = 222,048,624.07/20,924.50
  6. Step 6: Final answer
    x = 10,611.90

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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.