Home / 7,789.16-11,686.86-3,171.08

Finding the Fourth Proportional to 7,789.16, 11,686.86 and 3,171.08

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Solution

The fourth proportional to 7,789.16, 11,686.86 and 3,171.08 is: 4,757.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,789.16 : 11,686.86 = 3,171.08 : x
  2. Step 2: Convert to fraction form
    7,789.16/11,686.86 = 3,171.08/x
  3. Step 3: Cross multiply
    7,789.16x = 11,686.86 × 3,171.08
  4. Step 4: Simplify right side
    7,789.16x = 37,059,968.01
  5. Step 5: Solve for x
    x = 37,059,968.01/7,789.16
  6. Step 6: Final answer
    x = 4,757.89

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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.