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Finding the Fourth Proportional to 21,020.99, 29,009.07 and 11,589.48

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Solution

The fourth proportional to 21,020.99, 29,009.07 and 11,589.48 is: 15,993.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.99 : 29,009.07 = 11,589.48 : x
  2. Step 2: Convert to fraction form
    21,020.99/29,009.07 = 11,589.48/x
  3. Step 3: Cross multiply
    21,020.99x = 29,009.07 × 11,589.48
  4. Step 4: Simplify right side
    21,020.99x = 336,200,036.58
  5. Step 5: Solve for x
    x = 336,200,036.58/21,020.99
  6. Step 6: Final answer
    x = 15,993.54

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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.