Home / 20,674.72-28,531.31-11,243.48

Finding the Fourth Proportional to 20,674.72, 28,531.31 and 11,243.48

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Solution

The fourth proportional to 20,674.72, 28,531.31 and 11,243.48 is: 15,516.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,674.72 : 28,531.31 = 11,243.48 : x
  2. Step 2: Convert to fraction form
    20,674.72/28,531.31 = 11,243.48/x
  3. Step 3: Cross multiply
    20,674.72x = 28,531.31 × 11,243.48
  4. Step 4: Simplify right side
    20,674.72x = 320,791,213.36
  5. Step 5: Solve for x
    x = 320,791,213.36/20,674.72
  6. Step 6: Final answer
    x = 15,516.11

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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.