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Finding the Fourth Proportional to 20,490.10, 30,744.90 and 7,343.80

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Solution

The fourth proportional to 20,490.10, 30,744.90 and 7,343.80 is: 11,019.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.10 : 30,744.90 = 7,343.80 : x
  2. Step 2: Convert to fraction form
    20,490.10/30,744.90 = 7,343.80/x
  3. Step 3: Cross multiply
    20,490.10x = 30,744.90 × 7,343.80
  4. Step 4: Simplify right side
    20,490.10x = 225,784,396.62
  5. Step 5: Solve for x
    x = 225,784,396.62/20,490.10
  6. Step 6: Final answer
    x = 11,019.19

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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.