Home / 21,158.88-29,198.96-12,206.40

Finding the Fourth Proportional to 21,158.88, 29,198.96 and 12,206.40

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Solution

The fourth proportional to 21,158.88, 29,198.96 and 12,206.40 is: 16,844.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.88 : 29,198.96 = 12,206.40 : x
  2. Step 2: Convert to fraction form
    21,158.88/29,198.96 = 12,206.40/x
  3. Step 3: Cross multiply
    21,158.88x = 29,198.96 × 12,206.40
  4. Step 4: Simplify right side
    21,158.88x = 356,414,185.34
  5. Step 5: Solve for x
    x = 356,414,185.34/21,158.88
  6. Step 6: Final answer
    x = 16,844.66

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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.