Home / 8,819.85-12,171.39-5,285.11

Finding the Fourth Proportional to 8,819.85, 12,171.39 and 5,285.11

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Solution

The fourth proportional to 8,819.85, 12,171.39 and 5,285.11 is: 7,293.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,819.85 : 12,171.39 = 5,285.11 : x
  2. Step 2: Convert to fraction form
    8,819.85/12,171.39 = 5,285.11/x
  3. Step 3: Cross multiply
    8,819.85x = 12,171.39 × 5,285.11
  4. Step 4: Simplify right side
    8,819.85x = 64,327,074.15
  5. Step 5: Solve for x
    x = 64,327,074.15/8,819.85
  6. Step 6: Final answer
    x = 7,293.44

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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.