Home / 21,021-29,009.10-11,589.40

Finding the Fourth Proportional to 21,021, 29,009.10 and 11,589.40

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Solution

The fourth proportional to 21,021, 29,009.10 and 11,589.40 is: 15,993.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021 : 29,009.10 = 11,589.40 : x
  2. Step 2: Convert to fraction form
    21,021/29,009.10 = 11,589.40/x
  3. Step 3: Cross multiply
    21,021x = 29,009.10 × 11,589.40
  4. Step 4: Simplify right side
    21,021x = 336,198,063.54
  5. Step 5: Solve for x
    x = 336,198,063.54/21,021
  6. Step 6: Final answer
    x = 15,993.44

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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.