Home / 19,408.39-29,112.35-13,685.78

Finding the Fourth Proportional to 19,408.39, 29,112.35 and 13,685.78

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Solution

The fourth proportional to 19,408.39, 29,112.35 and 13,685.78 is: 20,528.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,408.39 : 29,112.35 = 13,685.78 : x
  2. Step 2: Convert to fraction form
    19,408.39/29,112.35 = 13,685.78/x
  3. Step 3: Cross multiply
    19,408.39x = 29,112.35 × 13,685.78
  4. Step 4: Simplify right side
    19,408.39x = 398,425,324.38
  5. Step 5: Solve for x
    x = 398,425,324.38/19,408.39
  6. Step 6: Final answer
    x = 20,528.51

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.