Home / 21,415.45-29,550.04-12,217.09

Finding the Fourth Proportional to 21,415.45, 29,550.04 and 12,217.09

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Solution

The fourth proportional to 21,415.45, 29,550.04 and 12,217.09 is: 16,857.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,415.45 : 29,550.04 = 12,217.09 : x
  2. Step 2: Convert to fraction form
    21,415.45/29,550.04 = 12,217.09/x
  3. Step 3: Cross multiply
    21,415.45x = 29,550.04 × 12,217.09
  4. Step 4: Simplify right side
    21,415.45x = 361,015,498.18
  5. Step 5: Solve for x
    x = 361,015,498.18/21,415.45
  6. Step 6: Final answer
    x = 16,857.71

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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.