Home / 5,135.60-7,688.72-3,400.72

Finding the Fourth Proportional to 5,135.60, 7,688.72 and 3,400.72

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Solution

The fourth proportional to 5,135.60, 7,688.72 and 3,400.72 is: 5,091.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.60 : 7,688.72 = 3,400.72 : x
  2. Step 2: Convert to fraction form
    5,135.60/7,688.72 = 3,400.72/x
  3. Step 3: Cross multiply
    5,135.60x = 7,688.72 × 3,400.72
  4. Step 4: Simplify right side
    5,135.60x = 26,147,183.88
  5. Step 5: Solve for x
    x = 26,147,183.88/5,135.60
  6. Step 6: Final answer
    x = 5,091.36

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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.