Home / 5,105.40-7,045.30-3,115.24

Finding the Fourth Proportional to 5,105.40, 7,045.30 and 3,115.24

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Solution

The fourth proportional to 5,105.40, 7,045.30 and 3,115.24 is: 4,298.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.40 : 7,045.30 = 3,115.24 : x
  2. Step 2: Convert to fraction form
    5,105.40/7,045.30 = 3,115.24/x
  3. Step 3: Cross multiply
    5,105.40x = 7,045.30 × 3,115.24
  4. Step 4: Simplify right side
    5,105.40x = 21,947,800.37
  5. Step 5: Solve for x
    x = 21,947,800.37/5,105.40
  6. Step 6: Final answer
    x = 4,298.94

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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.