Home / 7,911.71-11,868.78-2,645.09

Finding the Fourth Proportional to 7,911.71, 11,868.78 and 2,645.09

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Solution

The fourth proportional to 7,911.71, 11,868.78 and 2,645.09 is: 3,968.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.71 : 11,868.78 = 2,645.09 : x
  2. Step 2: Convert to fraction form
    7,911.71/11,868.78 = 2,645.09/x
  3. Step 3: Cross multiply
    7,911.71x = 11,868.78 × 2,645.09
  4. Step 4: Simplify right side
    7,911.71x = 31,393,991.29
  5. Step 5: Solve for x
    x = 31,393,991.29/7,911.71
  6. Step 6: Final answer
    x = 3,968.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.