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Finding the Fourth Proportional to 21,009.00, 28,992.04 and 11,448.97

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Solution

The fourth proportional to 21,009.00, 28,992.04 and 11,448.97 is: 15,799.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.00 : 28,992.04 = 11,448.97 : x
  2. Step 2: Convert to fraction form
    21,009.00/28,992.04 = 11,448.97/x
  3. Step 3: Cross multiply
    21,009.00x = 28,992.04 × 11,448.97
  4. Step 4: Simplify right side
    21,009.00x = 331,928,793.99
  5. Step 5: Solve for x
    x = 331,928,793.99/21,009.00
  6. Step 6: Final answer
    x = 15,799.37

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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.