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Finding the Fourth Proportional to 20,272.60, 30,408.90 and 19,041.40

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Solution

The fourth proportional to 20,272.60, 30,408.90 and 19,041.40 is: 28,562.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,272.60 : 30,408.90 = 19,041.40 : x
  2. Step 2: Convert to fraction form
    20,272.60/30,408.90 = 19,041.40/x
  3. Step 3: Cross multiply
    20,272.60x = 30,408.90 × 19,041.40
  4. Step 4: Simplify right side
    20,272.60x = 579,028,028.46
  5. Step 5: Solve for x
    x = 579,028,028.46/20,272.60
  6. Step 6: Final answer
    x = 28,562.10

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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.