Home / 7,185.28-10,777.92-1,991.02

Finding the Fourth Proportional to 7,185.28, 10,777.92 and 1,991.02

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Solution

The fourth proportional to 7,185.28, 10,777.92 and 1,991.02 is: 2,986.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,185.28 : 10,777.92 = 1,991.02 : x
  2. Step 2: Convert to fraction form
    7,185.28/10,777.92 = 1,991.02/x
  3. Step 3: Cross multiply
    7,185.28x = 10,777.92 × 1,991.02
  4. Step 4: Simplify right side
    7,185.28x = 21,459,054.28
  5. Step 5: Solve for x
    x = 21,459,054.28/7,185.28
  6. Step 6: Final answer
    x = 2,986.53

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Double scale
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Similar ratio
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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.