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Finding the Fourth Proportional to 15,012.56, 20,717.34 and 8,388.56

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Solution

The fourth proportional to 15,012.56, 20,717.34 and 8,388.56 is: 11,576.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,012.56 : 20,717.34 = 8,388.56 : x
  2. Step 2: Convert to fraction form
    15,012.56/20,717.34 = 8,388.56/x
  3. Step 3: Cross multiply
    15,012.56x = 20,717.34 × 8,388.56
  4. Step 4: Simplify right side
    15,012.56x = 173,788,669.97
  5. Step 5: Solve for x
    x = 173,788,669.97/15,012.56
  6. Step 6: Final answer
    x = 11,576.22

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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.