Home / 5,178.18-7,145.78-2,940.02

Finding the Fourth Proportional to 5,178.18, 7,145.78 and 2,940.02

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Solution

The fourth proportional to 5,178.18, 7,145.78 and 2,940.02 is: 4,057.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.18 : 7,145.78 = 2,940.02 : x
  2. Step 2: Convert to fraction form
    5,178.18/7,145.78 = 2,940.02/x
  3. Step 3: Cross multiply
    5,178.18x = 7,145.78 × 2,940.02
  4. Step 4: Simplify right side
    5,178.18x = 21,008,685.69
  5. Step 5: Solve for x
    x = 21,008,685.69/5,178.18
  6. Step 6: Final answer
    x = 4,057.16

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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.