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Finding the Fourth Proportional to 19,201.25, 28,819.88 and 11,820.13

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Solution

The fourth proportional to 19,201.25, 28,819.88 and 11,820.13 is: 17,741.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,201.25 : 28,819.88 = 11,820.13 : x
  2. Step 2: Convert to fraction form
    19,201.25/28,819.88 = 11,820.13/x
  3. Step 3: Cross multiply
    19,201.25x = 28,819.88 × 11,820.13
  4. Step 4: Simplify right side
    19,201.25x = 340,654,608.12
  5. Step 5: Solve for x
    x = 340,654,608.12/19,201.25
  6. Step 6: Final answer
    x = 17,741.27

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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.