Home / 21,859.38-30,156.39-13,897.35

Finding the Fourth Proportional to 21,859.38, 30,156.39 and 13,897.35

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Solution

The fourth proportional to 21,859.38, 30,156.39 and 13,897.35 is: 19,172.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.38 : 30,156.39 = 13,897.35 : x
  2. Step 2: Convert to fraction form
    21,859.38/30,156.39 = 13,897.35/x
  3. Step 3: Cross multiply
    21,859.38x = 30,156.39 × 13,897.35
  4. Step 4: Simplify right side
    21,859.38x = 419,093,906.57
  5. Step 5: Solve for x
    x = 419,093,906.57/21,859.38
  6. Step 6: Final answer
    x = 19,172.27

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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.