Home / 9,710.12-13,399.45-5,729.78

Finding the Fourth Proportional to 9,710.12, 13,399.45 and 5,729.78

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Solution

The fourth proportional to 9,710.12, 13,399.45 and 5,729.78 is: 7,906.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,710.12 : 13,399.45 = 5,729.78 : x
  2. Step 2: Convert to fraction form
    9,710.12/13,399.45 = 5,729.78/x
  3. Step 3: Cross multiply
    9,710.12x = 13,399.45 × 5,729.78
  4. Step 4: Simplify right side
    9,710.12x = 76,775,919.80
  5. Step 5: Solve for x
    x = 76,775,919.80/9,710.12
  6. Step 6: Final answer
    x = 7,906.79

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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.