Home / 21,690.91-29,942.44-13,195.79

Finding the Fourth Proportional to 21,690.91, 29,942.44 and 13,195.79

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Solution

The fourth proportional to 21,690.91, 29,942.44 and 13,195.79 is: 18,215.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,690.91 : 29,942.44 = 13,195.79 : x
  2. Step 2: Convert to fraction form
    21,690.91/29,942.44 = 13,195.79/x
  3. Step 3: Cross multiply
    21,690.91x = 29,942.44 × 13,195.79
  4. Step 4: Simplify right side
    21,690.91x = 395,114,150.33
  5. Step 5: Solve for x
    x = 395,114,150.33/21,690.91
  6. Step 6: Final answer
    x = 18,215.66

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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.