Home / 7,018.78-9,685.51-3,874.78

Finding the Fourth Proportional to 7,018.78, 9,685.51 and 3,874.78

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Solution

The fourth proportional to 7,018.78, 9,685.51 and 3,874.78 is: 5,346.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,018.78 : 9,685.51 = 3,874.78 : x
  2. Step 2: Convert to fraction form
    7,018.78/9,685.51 = 3,874.78/x
  3. Step 3: Cross multiply
    7,018.78x = 9,685.51 × 3,874.78
  4. Step 4: Simplify right side
    7,018.78x = 37,529,220.44
  5. Step 5: Solve for x
    x = 37,529,220.44/7,018.78
  6. Step 6: Final answer
    x = 5,346.97

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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.