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Finding the Fourth Proportional to 20,104.60, 30,156.90 and 18,549.40

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Solution

The fourth proportional to 20,104.60, 30,156.90 and 18,549.40 is: 27,824.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,104.60 : 30,156.90 = 18,549.40 : x
  2. Step 2: Convert to fraction form
    20,104.60/30,156.90 = 18,549.40/x
  3. Step 3: Cross multiply
    20,104.60x = 30,156.90 × 18,549.40
  4. Step 4: Simplify right side
    20,104.60x = 559,392,400.86
  5. Step 5: Solve for x
    x = 559,392,400.86/20,104.60
  6. Step 6: Final answer
    x = 27,824.10

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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.