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Finding the Fourth Proportional to 27,139.20, 40,694.40 and 9,609.60

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Solution

The fourth proportional to 27,139.20, 40,694.40 and 9,609.60 is: 14,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,139.20 : 40,694.40 = 9,609.60 : x
  2. Step 2: Convert to fraction form
    27,139.20/40,694.40 = 9,609.60/x
  3. Step 3: Cross multiply
    27,139.20x = 40,694.40 × 9,609.60
  4. Step 4: Simplify right side
    27,139.20x = 391,056,906.24
  5. Step 5: Solve for x
    x = 391,056,906.24/27,139.20
  6. Step 6: Final answer
    x = 14,409.30

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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.