Home / 21,158.89-29,198.18-12,205.87

Finding the Fourth Proportional to 21,158.89, 29,198.18 and 12,205.87

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Solution

The fourth proportional to 21,158.89, 29,198.18 and 12,205.87 is: 16,843.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.89 : 29,198.18 = 12,205.87 : x
  2. Step 2: Convert to fraction form
    21,158.89/29,198.18 = 12,205.87/x
  3. Step 3: Cross multiply
    21,158.89x = 29,198.18 × 12,205.87
  4. Step 4: Simplify right side
    21,158.89x = 356,389,146.84
  5. Step 5: Solve for x
    x = 356,389,146.84/21,158.89
  6. Step 6: Final answer
    x = 16,843.47

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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.