Home / 21,694.68-29,940.12-12,135.47

Finding the Fourth Proportional to 21,694.68, 29,940.12 and 12,135.47

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Solution

The fourth proportional to 21,694.68, 29,940.12 and 12,135.47 is: 16,747.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,694.68 : 29,940.12 = 12,135.47 : x
  2. Step 2: Convert to fraction form
    21,694.68/29,940.12 = 12,135.47/x
  3. Step 3: Cross multiply
    21,694.68x = 29,940.12 × 12,135.47
  4. Step 4: Simplify right side
    21,694.68x = 363,337,278.36
  5. Step 5: Solve for x
    x = 363,337,278.36/21,694.68
  6. Step 6: Final answer
    x = 16,747.76

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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.