Home / 7,985.18-11,977.79-2,791.05

Finding the Fourth Proportional to 7,985.18, 11,977.79 and 2,791.05

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Solution

The fourth proportional to 7,985.18, 11,977.79 and 2,791.05 is: 4,186.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.18 : 11,977.79 = 2,791.05 : x
  2. Step 2: Convert to fraction form
    7,985.18/11,977.79 = 2,791.05/x
  3. Step 3: Cross multiply
    7,985.18x = 11,977.79 × 2,791.05
  4. Step 4: Simplify right side
    7,985.18x = 33,430,610.78
  5. Step 5: Solve for x
    x = 33,430,610.78/7,985.18
  6. Step 6: Final answer
    x = 4,186.58

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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.