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Finding the Fourth Proportional to 20,374.20, 30,566.70 and 7,225.20

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Solution

The fourth proportional to 20,374.20, 30,566.70 and 7,225.20 is: 10,839.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.20 : 30,566.70 = 7,225.20 : x
  2. Step 2: Convert to fraction form
    20,374.20/30,566.70 = 7,225.20/x
  3. Step 3: Cross multiply
    20,374.20x = 30,566.70 × 7,225.20
  4. Step 4: Simplify right side
    20,374.20x = 220,850,520.84
  5. Step 5: Solve for x
    x = 220,850,520.84/20,374.20
  6. Step 6: Final answer
    x = 10,839.71

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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.