Home / 7,050.42-9,729.75-3,906.78

Finding the Fourth Proportional to 7,050.42, 9,729.75 and 3,906.78

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Solution

The fourth proportional to 7,050.42, 9,729.75 and 3,906.78 is: 5,391.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,050.42 : 9,729.75 = 3,906.78 : x
  2. Step 2: Convert to fraction form
    7,050.42/9,729.75 = 3,906.78/x
  3. Step 3: Cross multiply
    7,050.42x = 9,729.75 × 3,906.78
  4. Step 4: Simplify right side
    7,050.42x = 38,011,992.71
  5. Step 5: Solve for x
    x = 38,011,992.71/7,050.42
  6. Step 6: Final answer
    x = 5,391.45

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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.