Home / 3,859.38-5,313.60-2,678.40

Finding the Fourth Proportional to 3,859.38, 5,313.60 and 2,678.40

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Solution

The fourth proportional to 3,859.38, 5,313.60 and 2,678.40 is: 3,687.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.38 : 5,313.60 = 2,678.40 : x
  2. Step 2: Convert to fraction form
    3,859.38/5,313.60 = 2,678.40/x
  3. Step 3: Cross multiply
    3,859.38x = 5,313.60 × 2,678.40
  4. Step 4: Simplify right side
    3,859.38x = 14,231,946.24
  5. Step 5: Solve for x
    x = 14,231,946.24/3,859.38
  6. Step 6: Final answer
    x = 3,687.63

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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.