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Finding the Fourth Proportional to 20,439.54, 30,646.15 and 8,600.99

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Solution

The fourth proportional to 20,439.54, 30,646.15 and 8,600.99 is: 12,895.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.54 : 30,646.15 = 8,600.99 : x
  2. Step 2: Convert to fraction form
    20,439.54/30,646.15 = 8,600.99/x
  3. Step 3: Cross multiply
    20,439.54x = 30,646.15 × 8,600.99
  4. Step 4: Simplify right side
    20,439.54x = 263,587,054.96
  5. Step 5: Solve for x
    x = 263,587,054.96/20,439.54
  6. Step 6: Final answer
    x = 12,895.94

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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.