Home / 21,158.95-29,198.21-12,205.91

Finding the Fourth Proportional to 21,158.95, 29,198.21 and 12,205.91

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Solution

The fourth proportional to 21,158.95, 29,198.21 and 12,205.91 is: 16,843.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.95 : 29,198.21 = 12,205.91 : x
  2. Step 2: Convert to fraction form
    21,158.95/29,198.21 = 12,205.91/x
  3. Step 3: Cross multiply
    21,158.95x = 29,198.21 × 12,205.91
  4. Step 4: Simplify right side
    21,158.95x = 356,390,723.42
  5. Step 5: Solve for x
    x = 356,390,723.42/21,158.95
  6. Step 6: Final answer
    x = 16,843.50

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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.