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Finding the Fourth Proportional to 20,205.60, 30,308.40 and 18,018.60

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Solution

The fourth proportional to 20,205.60, 30,308.40 and 18,018.60 is: 27,027.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,205.60 : 30,308.40 = 18,018.60 : x
  2. Step 2: Convert to fraction form
    20,205.60/30,308.40 = 18,018.60/x
  3. Step 3: Cross multiply
    20,205.60x = 30,308.40 × 18,018.60
  4. Step 4: Simplify right side
    20,205.60x = 546,114,936.24
  5. Step 5: Solve for x
    x = 546,114,936.24/20,205.60
  6. Step 6: Final answer
    x = 27,027.90

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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.