Home / 21,179.91-29,231.78-11,751.51

Finding the Fourth Proportional to 21,179.91, 29,231.78 and 11,751.51

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Solution

The fourth proportional to 21,179.91, 29,231.78 and 11,751.51 is: 16,219.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,179.91 : 29,231.78 = 11,751.51 : x
  2. Step 2: Convert to fraction form
    21,179.91/29,231.78 = 11,751.51/x
  3. Step 3: Cross multiply
    21,179.91x = 29,231.78 × 11,751.51
  4. Step 4: Simplify right side
    21,179.91x = 343,517,554.99
  5. Step 5: Solve for x
    x = 343,517,554.99/21,179.91
  6. Step 6: Final answer
    x = 16,219.03

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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.