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Finding the Fourth Proportional to 27,108.20, 40,619.10 and 20,109.80

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Solution

The fourth proportional to 27,108.20, 40,619.10 and 20,109.80 is: 30,132.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,108.20 : 40,619.10 = 20,109.80 : x
  2. Step 2: Convert to fraction form
    27,108.20/40,619.10 = 20,109.80/x
  3. Step 3: Cross multiply
    27,108.20x = 40,619.10 × 20,109.80
  4. Step 4: Simplify right side
    27,108.20x = 816,841,977.18
  5. Step 5: Solve for x
    x = 816,841,977.18/27,108.20
  6. Step 6: Final answer
    x = 30,132.65

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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.