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Finding the Fourth Proportional to 15,104.10, 20,842.77 and 8,389.34

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Solution

The fourth proportional to 15,104.10, 20,842.77 and 8,389.34 is: 11,576.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,104.10 : 20,842.77 = 8,389.34 : x
  2. Step 2: Convert to fraction form
    15,104.10/20,842.77 = 8,389.34/x
  3. Step 3: Cross multiply
    15,104.10x = 20,842.77 × 8,389.34
  4. Step 4: Simplify right side
    15,104.10x = 174,856,979.86
  5. Step 5: Solve for x
    x = 174,856,979.86/15,104.10
  6. Step 6: Final answer
    x = 11,576.79

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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.