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Finding the Fourth Proportional to 20,173.80, 27,840.74 and 11,221.10

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Solution

The fourth proportional to 20,173.80, 27,840.74 and 11,221.10 is: 15,485.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,173.80 : 27,840.74 = 11,221.10 : x
  2. Step 2: Convert to fraction form
    20,173.80/27,840.74 = 11,221.10/x
  3. Step 3: Cross multiply
    20,173.80x = 27,840.74 × 11,221.10
  4. Step 4: Simplify right side
    20,173.80x = 312,403,532.30
  5. Step 5: Solve for x
    x = 312,403,532.30/20,173.80
  6. Step 6: Final answer
    x = 15,485.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.