Home / 21,121.79-29,154.56-12,175.27

Finding the Fourth Proportional to 21,121.79, 29,154.56 and 12,175.27

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Solution

The fourth proportional to 21,121.79, 29,154.56 and 12,175.27 is: 16,805.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,121.79 : 29,154.56 = 12,175.27 : x
  2. Step 2: Convert to fraction form
    21,121.79/29,154.56 = 12,175.27/x
  3. Step 3: Cross multiply
    21,121.79x = 29,154.56 × 12,175.27
  4. Step 4: Simplify right side
    21,121.79x = 354,964,578.85
  5. Step 5: Solve for x
    x = 354,964,578.85/21,121.79
  6. Step 6: Final answer
    x = 16,805.61

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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.