Home / 21,523.87-29,694.85-15,872.12

Finding the Fourth Proportional to 21,523.87, 29,694.85 and 15,872.12

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Solution

The fourth proportional to 21,523.87, 29,694.85 and 15,872.12 is: 21,897.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,523.87 : 29,694.85 = 15,872.12 : x
  2. Step 2: Convert to fraction form
    21,523.87/29,694.85 = 15,872.12/x
  3. Step 3: Cross multiply
    21,523.87x = 29,694.85 × 15,872.12
  4. Step 4: Simplify right side
    21,523.87x = 471,320,222.58
  5. Step 5: Solve for x
    x = 471,320,222.58/21,523.87
  6. Step 6: Final answer
    x = 21,897.56

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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.