Home / 21,008.12-28,991.22-11,576.66

Finding the Fourth Proportional to 21,008.12, 28,991.22 and 11,576.66

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Solution

The fourth proportional to 21,008.12, 28,991.22 and 11,576.66 is: 15,975.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,008.12 : 28,991.22 = 11,576.66 : x
  2. Step 2: Convert to fraction form
    21,008.12/28,991.22 = 11,576.66/x
  3. Step 3: Cross multiply
    21,008.12x = 28,991.22 × 11,576.66
  4. Step 4: Simplify right side
    21,008.12x = 335,621,496.93
  5. Step 5: Solve for x
    x = 335,621,496.93/21,008.12
  6. Step 6: Final answer
    x = 15,975.80

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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.