Home / 7,123.11-9,829.36-3,936.36

Finding the Fourth Proportional to 7,123.11, 9,829.36 and 3,936.36

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Solution

The fourth proportional to 7,123.11, 9,829.36 and 3,936.36 is: 5,431.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,123.11 : 9,829.36 = 3,936.36 : x
  2. Step 2: Convert to fraction form
    7,123.11/9,829.36 = 3,936.36/x
  3. Step 3: Cross multiply
    7,123.11x = 9,829.36 × 3,936.36
  4. Step 4: Simplify right side
    7,123.11x = 38,691,941.31
  5. Step 5: Solve for x
    x = 38,691,941.31/7,123.11
  6. Step 6: Final answer
    x = 5,431.89

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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.