Home / 7,123.12-9,829.66-3,936.23

Finding the Fourth Proportional to 7,123.12, 9,829.66 and 3,936.23

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Solution

The fourth proportional to 7,123.12, 9,829.66 and 3,936.23 is: 5,431.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.12 : 9,829.66 = 3,936.23 : x
  2. Step 2: Convert to fraction form
    7,123.12/9,829.66 = 3,936.23/x
  3. Step 3: Cross multiply
    7,123.12x = 9,829.66 × 3,936.23
  4. Step 4: Simplify right side
    7,123.12x = 38,691,802.58
  5. Step 5: Solve for x
    x = 38,691,802.58/7,123.12
  6. Step 6: Final answer
    x = 5,431.86

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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.