Home / 21,011.41-28,997.09-11,580.85

Finding the Fourth Proportional to 21,011.41, 28,997.09 and 11,580.85

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Solution

The fourth proportional to 21,011.41, 28,997.09 and 11,580.85 is: 15,982.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.41 : 28,997.09 = 11,580.85 : x
  2. Step 2: Convert to fraction form
    21,011.41/28,997.09 = 11,580.85/x
  3. Step 3: Cross multiply
    21,011.41x = 28,997.09 × 11,580.85
  4. Step 4: Simplify right side
    21,011.41x = 335,810,949.73
  5. Step 5: Solve for x
    x = 335,810,949.73/21,011.41
  6. Step 6: Final answer
    x = 15,982.31

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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.