Home / 20,749.70-28,626.42-12,778.08

Finding the Fourth Proportional to 20,749.70, 28,626.42 and 12,778.08

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Solution

The fourth proportional to 20,749.70, 28,626.42 and 12,778.08 is: 17,628.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.70 : 28,626.42 = 12,778.08 : x
  2. Step 2: Convert to fraction form
    20,749.70/28,626.42 = 12,778.08/x
  3. Step 3: Cross multiply
    20,749.70x = 28,626.42 × 12,778.08
  4. Step 4: Simplify right side
    20,749.70x = 365,790,620.98
  5. Step 5: Solve for x
    x = 365,790,620.98/20,749.70
  6. Step 6: Final answer
    x = 17,628.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.