Home / 8,127.93-11,221.75-6,639.42

Finding the Fourth Proportional to 8,127.93, 11,221.75 and 6,639.42

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Solution

The fourth proportional to 8,127.93, 11,221.75 and 6,639.42 is: 9,166.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,127.93 : 11,221.75 = 6,639.42 : x
  2. Step 2: Convert to fraction form
    8,127.93/11,221.75 = 6,639.42/x
  3. Step 3: Cross multiply
    8,127.93x = 11,221.75 × 6,639.42
  4. Step 4: Simplify right side
    8,127.93x = 74,505,911.39
  5. Step 5: Solve for x
    x = 74,505,911.39/8,127.93
  6. Step 6: Final answer
    x = 9,166.65

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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.