Home / 7,171.81-9,896.77-3,985.33

Finding the Fourth Proportional to 7,171.81, 9,896.77 and 3,985.33

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Solution

The fourth proportional to 7,171.81, 9,896.77 and 3,985.33 is: 5,499.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,171.81 : 9,896.77 = 3,985.33 : x
  2. Step 2: Convert to fraction form
    7,171.81/9,896.77 = 3,985.33/x
  3. Step 3: Cross multiply
    7,171.81x = 9,896.77 × 3,985.33
  4. Step 4: Simplify right side
    7,171.81x = 39,441,894.38
  5. Step 5: Solve for x
    x = 39,441,894.38/7,171.81
  6. Step 6: Final answer
    x = 5,499.57

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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.