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Finding the Fourth Proportional to 20,165.30, 30,250.65 and 7,021.70

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Solution

The fourth proportional to 20,165.30, 30,250.65 and 7,021.70 is: 10,533.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,165.30 : 30,250.65 = 7,021.70 : x
  2. Step 2: Convert to fraction form
    20,165.30/30,250.65 = 7,021.70/x
  3. Step 3: Cross multiply
    20,165.30x = 30,250.65 × 7,021.70
  4. Step 4: Simplify right side
    20,165.30x = 212,410,989.11
  5. Step 5: Solve for x
    x = 212,410,989.11/20,165.30
  6. Step 6: Final answer
    x = 10,533.49

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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.