Home / 3,693.78-5,097.30-2,121.78

Finding the Fourth Proportional to 3,693.78, 5,097.30 and 2,121.78

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Solution

The fourth proportional to 3,693.78, 5,097.30 and 2,121.78 is: 2,927.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,693.78 : 5,097.30 = 2,121.78 : x
  2. Step 2: Convert to fraction form
    3,693.78/5,097.30 = 2,121.78/x
  3. Step 3: Cross multiply
    3,693.78x = 5,097.30 × 2,121.78
  4. Step 4: Simplify right side
    3,693.78x = 10,815,349.19
  5. Step 5: Solve for x
    x = 10,815,349.19/3,693.78
  6. Step 6: Final answer
    x = 2,927.99

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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.