Home / 21,218.20-29,246.18-16,961.78

Finding the Fourth Proportional to 21,218.20, 29,246.18 and 16,961.78

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Solution

The fourth proportional to 21,218.20, 29,246.18 and 16,961.78 is: 23,379.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.20 : 29,246.18 = 16,961.78 : x
  2. Step 2: Convert to fraction form
    21,218.20/29,246.18 = 16,961.78/x
  3. Step 3: Cross multiply
    21,218.20x = 29,246.18 × 16,961.78
  4. Step 4: Simplify right side
    21,218.20x = 496,067,271.00
  5. Step 5: Solve for x
    x = 496,067,271.00/21,218.20
  6. Step 6: Final answer
    x = 23,379.33

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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.