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Finding the Fourth Proportional to 20,639.60, 30,894.60 and 16,233.20

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Solution

The fourth proportional to 20,639.60, 30,894.60 and 16,233.20 is: 24,298.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.60 : 30,894.60 = 16,233.20 : x
  2. Step 2: Convert to fraction form
    20,639.60/30,894.60 = 16,233.20/x
  3. Step 3: Cross multiply
    20,639.60x = 30,894.60 × 16,233.20
  4. Step 4: Simplify right side
    20,639.60x = 501,518,220.72
  5. Step 5: Solve for x
    x = 501,518,220.72/20,639.60
  6. Step 6: Final answer
    x = 24,298.83

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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.