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Finding the Fourth Proportional to 15,103.85, 20,842.91 and 8,389.31

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Solution

The fourth proportional to 15,103.85, 20,842.91 and 8,389.31 is: 11,577.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,103.85 : 20,842.91 = 8,389.31 : x
  2. Step 2: Convert to fraction form
    15,103.85/20,842.91 = 8,389.31/x
  3. Step 3: Cross multiply
    15,103.85x = 20,842.91 × 8,389.31
  4. Step 4: Simplify right side
    15,103.85x = 174,857,594.72
  5. Step 5: Solve for x
    x = 174,857,594.72/15,103.85
  6. Step 6: Final answer
    x = 11,577.02

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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.