Home / 3,935.12-5,430.24-2,166.75

Finding the Fourth Proportional to 3,935.12, 5,430.24 and 2,166.75

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Solution

The fourth proportional to 3,935.12, 5,430.24 and 2,166.75 is: 2,989.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,935.12 : 5,430.24 = 2,166.75 : x
  2. Step 2: Convert to fraction form
    3,935.12/5,430.24 = 2,166.75/x
  3. Step 3: Cross multiply
    3,935.12x = 5,430.24 × 2,166.75
  4. Step 4: Simplify right side
    3,935.12x = 11,765,972.52
  5. Step 5: Solve for x
    x = 11,765,972.52/3,935.12
  6. Step 6: Final answer
    x = 2,989.99

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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.