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Finding the Fourth Proportional to 20,619.60, 30,864.60 and 16,213.20

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Solution

The fourth proportional to 20,619.60, 30,864.60 and 16,213.20 is: 24,268.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.60 : 30,864.60 = 16,213.20 : x
  2. Step 2: Convert to fraction form
    20,619.60/30,864.60 = 16,213.20/x
  3. Step 3: Cross multiply
    20,619.60x = 30,864.60 × 16,213.20
  4. Step 4: Simplify right side
    20,619.60x = 500,413,932.72
  5. Step 5: Solve for x
    x = 500,413,932.72/20,619.60
  6. Step 6: Final answer
    x = 24,268.85

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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.