Home / 21,169.10-29,217.17-12,215.36

Finding the Fourth Proportional to 21,169.10, 29,217.17 and 12,215.36

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Solution

The fourth proportional to 21,169.10, 29,217.17 and 12,215.36 is: 16,859.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.10 : 29,217.17 = 12,215.36 : x
  2. Step 2: Convert to fraction form
    21,169.10/29,217.17 = 12,215.36/x
  3. Step 3: Cross multiply
    21,169.10x = 29,217.17 × 12,215.36
  4. Step 4: Simplify right side
    21,169.10x = 356,898,249.73
  5. Step 5: Solve for x
    x = 356,898,249.73/21,169.10
  6. Step 6: Final answer
    x = 16,859.40

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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.