Home / 15,910.11-21,930.89-12,121.29

Finding the Fourth Proportional to 15,910.11, 21,930.89 and 12,121.29

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Solution

The fourth proportional to 15,910.11, 21,930.89 and 12,121.29 is: 16,708.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,910.11 : 21,930.89 = 12,121.29 : x
  2. Step 2: Convert to fraction form
    15,910.11/21,930.89 = 12,121.29/x
  3. Step 3: Cross multiply
    15,910.11x = 21,930.89 × 12,121.29
  4. Step 4: Simplify right side
    15,910.11x = 265,830,617.04
  5. Step 5: Solve for x
    x = 265,830,617.04/15,910.11
  6. Step 6: Final answer
    x = 16,708.28

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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.