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Finding the Fourth Proportional to 20,491.10, 30,729.45 and 7,343.90

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Solution

The fourth proportional to 20,491.10, 30,729.45 and 7,343.90 is: 11,013.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.10 : 30,729.45 = 7,343.90 : x
  2. Step 2: Convert to fraction form
    20,491.10/30,729.45 = 7,343.90/x
  3. Step 3: Cross multiply
    20,491.10x = 30,729.45 × 7,343.90
  4. Step 4: Simplify right side
    20,491.10x = 225,674,007.86
  5. Step 5: Solve for x
    x = 225,674,007.86/20,491.10
  6. Step 6: Final answer
    x = 11,013.27

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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.