Home / 7,129.96-9,839.64-3,986.14

Finding the Fourth Proportional to 7,129.96, 9,839.64 and 3,986.14

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Solution

The fourth proportional to 7,129.96, 9,839.64 and 3,986.14 is: 5,501.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.96 : 9,839.64 = 3,986.14 : x
  2. Step 2: Convert to fraction form
    7,129.96/9,839.64 = 3,986.14/x
  3. Step 3: Cross multiply
    7,129.96x = 9,839.64 × 3,986.14
  4. Step 4: Simplify right side
    7,129.96x = 39,222,182.59
  5. Step 5: Solve for x
    x = 39,222,182.59/7,129.96
  6. Step 6: Final answer
    x = 5,501.04

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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.