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Finding the Fourth Proportional to 20,335.01, 30,507.78 and 11,908.63

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Solution

The fourth proportional to 20,335.01, 30,507.78 and 11,908.63 is: 17,866.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,335.01 : 30,507.78 = 11,908.63 : x
  2. Step 2: Convert to fraction form
    20,335.01/30,507.78 = 11,908.63/x
  3. Step 3: Cross multiply
    20,335.01x = 30,507.78 × 11,908.63
  4. Step 4: Simplify right side
    20,335.01x = 363,305,864.14
  5. Step 5: Solve for x
    x = 363,305,864.14/20,335.01
  6. Step 6: Final answer
    x = 17,866.03

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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.