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Finding the Fourth Proportional to 15,090.19, 20,823.49 and 8,375.82

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Solution

The fourth proportional to 15,090.19, 20,823.49 and 8,375.82 is: 11,558.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,090.19 : 20,823.49 = 8,375.82 : x
  2. Step 2: Convert to fraction form
    15,090.19/20,823.49 = 8,375.82/x
  3. Step 3: Cross multiply
    15,090.19x = 20,823.49 × 8,375.82
  4. Step 4: Simplify right side
    15,090.19x = 174,413,829.97
  5. Step 5: Solve for x
    x = 174,413,829.97/15,090.19
  6. Step 6: Final answer
    x = 11,558.09

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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.