Home / 21,086.14-29,109.03-13,543.74

Finding the Fourth Proportional to 21,086.14, 29,109.03 and 13,543.74

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Solution

The fourth proportional to 21,086.14, 29,109.03 and 13,543.74 is: 18,696.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,086.14 : 29,109.03 = 13,543.74 : x
  2. Step 2: Convert to fraction form
    21,086.14/29,109.03 = 13,543.74/x
  3. Step 3: Cross multiply
    21,086.14x = 29,109.03 × 13,543.74
  4. Step 4: Simplify right side
    21,086.14x = 394,245,133.97
  5. Step 5: Solve for x
    x = 394,245,133.97/21,086.14
  6. Step 6: Final answer
    x = 18,696.88

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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.