Home / 20,269.70-30,404.55-5,478.20

Finding the Fourth Proportional to 20,269.70, 30,404.55 and 5,478.20

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Solution

The fourth proportional to 20,269.70, 30,404.55 and 5,478.20 is: 8,217.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,269.70 : 30,404.55 = 5,478.20 : x
  2. Step 2: Convert to fraction form
    20,269.70/30,404.55 = 5,478.20/x
  3. Step 3: Cross multiply
    20,269.70x = 30,404.55 × 5,478.20
  4. Step 4: Simplify right side
    20,269.70x = 166,562,205.81
  5. Step 5: Solve for x
    x = 166,562,205.81/20,269.70
  6. Step 6: Final answer
    x = 8,217.30

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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.