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Finding the Fourth Proportional to 20,448.45, 30,672.68 and 7,299.11

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Solution

The fourth proportional to 20,448.45, 30,672.68 and 7,299.11 is: 10,948.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,448.45 : 30,672.68 = 7,299.11 : x
  2. Step 2: Convert to fraction form
    20,448.45/30,672.68 = 7,299.11/x
  3. Step 3: Cross multiply
    20,448.45x = 30,672.68 × 7,299.11
  4. Step 4: Simplify right side
    20,448.45x = 223,883,305.50
  5. Step 5: Solve for x
    x = 223,883,305.50/20,448.45
  6. Step 6: Final answer
    x = 10,948.67

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Double scale
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Similar ratio
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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.