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Finding the Fourth Proportional to 10,999.79, 16,502.42 and 5,149.56

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Solution

The fourth proportional to 10,999.79, 16,502.42 and 5,149.56 is: 7,725.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,999.79 : 16,502.42 = 5,149.56 : x
  2. Step 2: Convert to fraction form
    10,999.79/16,502.42 = 5,149.56/x
  3. Step 3: Cross multiply
    10,999.79x = 16,502.42 × 5,149.56
  4. Step 4: Simplify right side
    10,999.79x = 84,980,201.94
  5. Step 5: Solve for x
    x = 84,980,201.94/10,999.79
  6. Step 6: Final answer
    x = 7,725.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.