Home / 21,166.14-29,198.70-13,512.99

Finding the Fourth Proportional to 21,166.14, 29,198.70 and 13,512.99

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Solution

The fourth proportional to 21,166.14, 29,198.70 and 13,512.99 is: 18,641.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.14 : 29,198.70 = 13,512.99 : x
  2. Step 2: Convert to fraction form
    21,166.14/29,198.70 = 13,512.99/x
  3. Step 3: Cross multiply
    21,166.14x = 29,198.70 × 13,512.99
  4. Step 4: Simplify right side
    21,166.14x = 394,561,741.11
  5. Step 5: Solve for x
    x = 394,561,741.11/21,166.14
  6. Step 6: Final answer
    x = 18,641.18

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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.