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Finding the Fourth Proportional to 7,212.76, 10,820.60 and 3,052.78

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Solution

The fourth proportional to 7,212.76, 10,820.60 and 3,052.78 is: 4,579.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.76 : 10,820.60 = 3,052.78 : x
  2. Step 2: Convert to fraction form
    7,212.76/10,820.60 = 3,052.78/x
  3. Step 3: Cross multiply
    7,212.76x = 10,820.60 × 3,052.78
  4. Step 4: Simplify right side
    7,212.76x = 33,032,911.27
  5. Step 5: Solve for x
    x = 33,032,911.27/7,212.76
  6. Step 6: Final answer
    x = 4,579.79

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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.