Home / 21,021.39-29,009.34-11,589.75

Finding the Fourth Proportional to 21,021.39, 29,009.34 and 11,589.75

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Solution

The fourth proportional to 21,021.39, 29,009.34 and 11,589.75 is: 15,993.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.39 : 29,009.34 = 11,589.75 : x
  2. Step 2: Convert to fraction form
    21,021.39/29,009.34 = 11,589.75/x
  3. Step 3: Cross multiply
    21,021.39x = 29,009.34 × 11,589.75
  4. Step 4: Simplify right side
    21,021.39x = 336,210,998.27
  5. Step 5: Solve for x
    x = 336,210,998.27/21,021.39
  6. Step 6: Final answer
    x = 15,993.76

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Double scale
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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.