Home / 21,836.13-30,138.71-13,876.80

Finding the Fourth Proportional to 21,836.13, 30,138.71 and 13,876.80

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Solution

The fourth proportional to 21,836.13, 30,138.71 and 13,876.80 is: 19,153.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,836.13 : 30,138.71 = 13,876.80 : x
  2. Step 2: Convert to fraction form
    21,836.13/30,138.71 = 13,876.80/x
  3. Step 3: Cross multiply
    21,836.13x = 30,138.71 × 13,876.80
  4. Step 4: Simplify right side
    21,836.13x = 418,228,850.93
  5. Step 5: Solve for x
    x = 418,228,850.93/21,836.13
  6. Step 6: Final answer
    x = 19,153.07

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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.