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Finding the Fourth Proportional to 15,091.43, 20,827.40 and 8,378.42

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Solution

The fourth proportional to 15,091.43, 20,827.40 and 8,378.42 is: 11,562.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,091.43 : 20,827.40 = 8,378.42 : x
  2. Step 2: Convert to fraction form
    15,091.43/20,827.40 = 8,378.42/x
  3. Step 3: Cross multiply
    15,091.43x = 20,827.40 × 8,378.42
  4. Step 4: Simplify right side
    15,091.43x = 174,500,558.68
  5. Step 5: Solve for x
    x = 174,500,558.68/15,091.43
  6. Step 6: Final answer
    x = 11,562.89

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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.