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Finding the Fourth Proportional to 6,514.91, 8,991.78 and 3,720.41

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Solution

The fourth proportional to 6,514.91, 8,991.78 and 3,720.41 is: 5,134.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,514.91 : 8,991.78 = 3,720.41 : x
  2. Step 2: Convert to fraction form
    6,514.91/8,991.78 = 3,720.41/x
  3. Step 3: Cross multiply
    6,514.91x = 8,991.78 × 3,720.41
  4. Step 4: Simplify right side
    6,514.91x = 33,453,108.23
  5. Step 5: Solve for x
    x = 33,453,108.23/6,514.91
  6. Step 6: Final answer
    x = 5,134.85

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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.