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Finding the Fourth Proportional to 20,492.60, 30,738.90 and 18,548.60

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Solution

The fourth proportional to 20,492.60, 30,738.90 and 18,548.60 is: 27,822.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,492.60 : 30,738.90 = 18,548.60 : x
  2. Step 2: Convert to fraction form
    20,492.60/30,738.90 = 18,548.60/x
  3. Step 3: Cross multiply
    20,492.60x = 30,738.90 × 18,548.60
  4. Step 4: Simplify right side
    20,492.60x = 570,163,560.54
  5. Step 5: Solve for x
    x = 570,163,560.54/20,492.60
  6. Step 6: Final answer
    x = 27,822.90

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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.