Home / 7,185.52-10,778.40-1,991.44

Finding the Fourth Proportional to 7,185.52, 10,778.40 and 1,991.44

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Solution

The fourth proportional to 7,185.52, 10,778.40 and 1,991.44 is: 2,987.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,185.52 : 10,778.40 = 1,991.44 : x
  2. Step 2: Convert to fraction form
    7,185.52/10,778.40 = 1,991.44/x
  3. Step 3: Cross multiply
    7,185.52x = 10,778.40 × 1,991.44
  4. Step 4: Simplify right side
    7,185.52x = 21,464,536.90
  5. Step 5: Solve for x
    x = 21,464,536.90/7,185.52
  6. Step 6: Final answer
    x = 2,987.19

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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.