Home / 21,949.70-30,290.49-11,878.13

Finding the Fourth Proportional to 21,949.70, 30,290.49 and 11,878.13

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Solution

The fourth proportional to 21,949.70, 30,290.49 and 11,878.13 is: 16,391.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,949.70 : 30,290.49 = 11,878.13 : x
  2. Step 2: Convert to fraction form
    21,949.70/30,290.49 = 11,878.13/x
  3. Step 3: Cross multiply
    21,949.70x = 30,290.49 × 11,878.13
  4. Step 4: Simplify right side
    21,949.70x = 359,794,453.71
  5. Step 5: Solve for x
    x = 359,794,453.71/21,949.70
  6. Step 6: Final answer
    x = 16,391.77

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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.