Home / 7,122.74-9,829.35-3,936.20

Finding the Fourth Proportional to 7,122.74, 9,829.35 and 3,936.20

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Solution

The fourth proportional to 7,122.74, 9,829.35 and 3,936.20 is: 5,431.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.74 : 9,829.35 = 3,936.20 : x
  2. Step 2: Convert to fraction form
    7,122.74/9,829.35 = 3,936.20/x
  3. Step 3: Cross multiply
    7,122.74x = 9,829.35 × 3,936.20
  4. Step 4: Simplify right side
    7,122.74x = 38,690,238.32
  5. Step 5: Solve for x
    x = 38,690,238.32/7,122.74
  6. Step 6: Final answer
    x = 5,431.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.