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Finding the Fourth Proportional to 5,708.88, 7,876.44 and 3,939.84

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Solution

The fourth proportional to 5,708.88, 7,876.44 and 3,939.84 is: 5,435.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,708.88 : 7,876.44 = 3,939.84 : x
  2. Step 2: Convert to fraction form
    5,708.88/7,876.44 = 3,939.84/x
  3. Step 3: Cross multiply
    5,708.88x = 7,876.44 × 3,939.84
  4. Step 4: Simplify right side
    5,708.88x = 31,031,913.37
  5. Step 5: Solve for x
    x = 31,031,913.37/5,708.88
  6. Step 6: Final answer
    x = 5,435.73

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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.