Home / 8,129.36-11,205.54-6,634.71

Finding the Fourth Proportional to 8,129.36, 11,205.54 and 6,634.71

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Solution

The fourth proportional to 8,129.36, 11,205.54 and 6,634.71 is: 9,145.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.36 : 11,205.54 = 6,634.71 : x
  2. Step 2: Convert to fraction form
    8,129.36/11,205.54 = 6,634.71/x
  3. Step 3: Cross multiply
    8,129.36x = 11,205.54 × 6,634.71
  4. Step 4: Simplify right side
    8,129.36x = 74,345,508.29
  5. Step 5: Solve for x
    x = 74,345,508.29/8,129.36
  6. Step 6: Final answer
    x = 9,145.31

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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.