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Finding the Fourth Proportional to 20,272.60, 30,408.90 and 13,274.20

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Solution

The fourth proportional to 20,272.60, 30,408.90 and 13,274.20 is: 19,911.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.60 : 30,408.90 = 13,274.20 : x
  2. Step 2: Convert to fraction form
    20,272.60/30,408.90 = 13,274.20/x
  3. Step 3: Cross multiply
    20,272.60x = 30,408.90 × 13,274.20
  4. Step 4: Simplify right side
    20,272.60x = 403,653,820.38
  5. Step 5: Solve for x
    x = 403,653,820.38/20,272.60
  6. Step 6: Final answer
    x = 19,911.30

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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.