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Finding the Fourth Proportional to 20,165.10, 30,247.65 and 18,869.10

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Solution

The fourth proportional to 20,165.10, 30,247.65 and 18,869.10 is: 28,303.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,165.10 : 30,247.65 = 18,869.10 : x
  2. Step 2: Convert to fraction form
    20,165.10/30,247.65 = 18,869.10/x
  3. Step 3: Cross multiply
    20,165.10x = 30,247.65 × 18,869.10
  4. Step 4: Simplify right side
    20,165.10x = 570,745,932.62
  5. Step 5: Solve for x
    x = 570,745,932.62/20,165.10
  6. Step 6: Final answer
    x = 28,303.65

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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.