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Finding the Fourth Proportional to 5,135.70, 7,703.55 and 4,811.70

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Solution

The fourth proportional to 5,135.70, 7,703.55 and 4,811.70 is: 7,217.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,135.70 : 7,703.55 = 4,811.70 : x
  2. Step 2: Convert to fraction form
    5,135.70/7,703.55 = 4,811.70/x
  3. Step 3: Cross multiply
    5,135.70x = 7,703.55 × 4,811.70
  4. Step 4: Simplify right side
    5,135.70x = 37,067,171.54
  5. Step 5: Solve for x
    x = 37,067,171.54/5,135.70
  6. Step 6: Final answer
    x = 7,217.55

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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.