Home / 8,081.91-11,139.53-6,395.49

Finding the Fourth Proportional to 8,081.91, 11,139.53 and 6,395.49

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Solution

The fourth proportional to 8,081.91, 11,139.53 and 6,395.49 is: 8,815.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,081.91 : 11,139.53 = 6,395.49 : x
  2. Step 2: Convert to fraction form
    8,081.91/11,139.53 = 6,395.49/x
  3. Step 3: Cross multiply
    8,081.91x = 11,139.53 × 6,395.49
  4. Step 4: Simplify right side
    8,081.91x = 71,242,720.74
  5. Step 5: Solve for x
    x = 71,242,720.74/8,081.91
  6. Step 6: Final answer
    x = 8,815.08

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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.