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Finding the Fourth Proportional to 20,660.01, 30,999.21 and 11,775.02

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Solution

The fourth proportional to 20,660.01, 30,999.21 and 11,775.02 is: 17,667.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.01 : 30,999.21 = 11,775.02 : x
  2. Step 2: Convert to fraction form
    20,660.01/30,999.21 = 11,775.02/x
  3. Step 3: Cross multiply
    20,660.01x = 30,999.21 × 11,775.02
  4. Step 4: Simplify right side
    20,660.01x = 365,016,292.95
  5. Step 5: Solve for x
    x = 365,016,292.95/20,660.01
  6. Step 6: Final answer
    x = 17,667.77

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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.