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Finding the Fourth Proportional to 6,661.91, 9,992.28 and 6,139.91

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Solution

The fourth proportional to 6,661.91, 9,992.28 and 6,139.91 is: 9,209.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,661.91 : 9,992.28 = 6,139.91 : x
  2. Step 2: Convert to fraction form
    6,661.91/9,992.28 = 6,139.91/x
  3. Step 3: Cross multiply
    6,661.91x = 9,992.28 × 6,139.91
  4. Step 4: Simplify right side
    6,661.91x = 61,351,699.89
  5. Step 5: Solve for x
    x = 61,351,699.89/6,661.91
  6. Step 6: Final answer
    x = 9,209.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.