Home / 5,105.40-7,046.55-3,115.53

Finding the Fourth Proportional to 5,105.40, 7,046.55 and 3,115.53

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Solution

The fourth proportional to 5,105.40, 7,046.55 and 3,115.53 is: 4,300.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.40 : 7,046.55 = 3,115.53 : x
  2. Step 2: Convert to fraction form
    5,105.40/7,046.55 = 3,115.53/x
  3. Step 3: Cross multiply
    5,105.40x = 7,046.55 × 3,115.53
  4. Step 4: Simplify right side
    5,105.40x = 21,953,737.92
  5. Step 5: Solve for x
    x = 21,953,737.92/5,105.40
  6. Step 6: Final answer
    x = 4,300.10

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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.