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Finding the Fourth Proportional to 15,103.66, 20,842.17 and 8,388.90

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Solution

The fourth proportional to 15,103.66, 20,842.17 and 8,388.90 is: 11,576.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103.66 : 20,842.17 = 8,388.90 : x
  2. Step 2: Convert to fraction form
    15,103.66/20,842.17 = 8,388.90/x
  3. Step 3: Cross multiply
    15,103.66x = 20,842.17 × 8,388.90
  4. Step 4: Simplify right side
    15,103.66x = 174,842,879.91
  5. Step 5: Solve for x
    x = 174,842,879.91/15,103.66
  6. Step 6: Final answer
    x = 11,576.19

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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.