Home / 21,205.72-29,249.13-12,251.71

Finding the Fourth Proportional to 21,205.72, 29,249.13 and 12,251.71

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Solution

The fourth proportional to 21,205.72, 29,249.13 and 12,251.71 is: 16,898.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,205.72 : 29,249.13 = 12,251.71 : x
  2. Step 2: Convert to fraction form
    21,205.72/29,249.13 = 12,251.71/x
  3. Step 3: Cross multiply
    21,205.72x = 29,249.13 × 12,251.71
  4. Step 4: Simplify right side
    21,205.72x = 358,351,858.51
  5. Step 5: Solve for x
    x = 358,351,858.51/21,205.72
  6. Step 6: Final answer
    x = 16,898.83

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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.