Home / 5,173.92-7,139.76-3,078

Finding the Fourth Proportional to 5,173.92, 7,139.76 and 3,078

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Solution

The fourth proportional to 5,173.92, 7,139.76 and 3,078 is: 4,247.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173.92 : 7,139.76 = 3,078 : x
  2. Step 2: Convert to fraction form
    5,173.92/7,139.76 = 3,078/x
  3. Step 3: Cross multiply
    5,173.92x = 7,139.76 × 3,078
  4. Step 4: Simplify right side
    5,173.92x = 21,976,181.28
  5. Step 5: Solve for x
    x = 21,976,181.28/5,173.92
  6. Step 6: Final answer
    x = 4,247.49

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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.