Home / 21,013.11-28,997.82-11,453.45

Finding the Fourth Proportional to 21,013.11, 28,997.82 and 11,453.45

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Solution

The fourth proportional to 21,013.11, 28,997.82 and 11,453.45 is: 15,805.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.11 : 28,997.82 = 11,453.45 : x
  2. Step 2: Convert to fraction form
    21,013.11/28,997.82 = 11,453.45/x
  3. Step 3: Cross multiply
    21,013.11x = 28,997.82 × 11,453.45
  4. Step 4: Simplify right side
    21,013.11x = 332,124,936.49
  5. Step 5: Solve for x
    x = 332,124,936.49/21,013.11
  6. Step 6: Final answer
    x = 15,805.61

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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.