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Finding the Fourth Proportional to 20,449.56, 30,679.98 and 7,303.20

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Solution

The fourth proportional to 20,449.56, 30,679.98 and 7,303.20 is: 10,956.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.56 : 30,679.98 = 7,303.20 : x
  2. Step 2: Convert to fraction form
    20,449.56/30,679.98 = 7,303.20/x
  3. Step 3: Cross multiply
    20,449.56x = 30,679.98 × 7,303.20
  4. Step 4: Simplify right side
    20,449.56x = 224,062,029.94
  5. Step 5: Solve for x
    x = 224,062,029.94/20,449.56
  6. Step 6: Final answer
    x = 10,956.81

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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.