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Finding the Fourth Proportional to 8,516.79, 11,749.14 and 5,685.48

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Solution

The fourth proportional to 8,516.79, 11,749.14 and 5,685.48 is: 7,843.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,516.79 : 11,749.14 = 5,685.48 : x
  2. Step 2: Convert to fraction form
    8,516.79/11,749.14 = 5,685.48/x
  3. Step 3: Cross multiply
    8,516.79x = 11,749.14 × 5,685.48
  4. Step 4: Simplify right side
    8,516.79x = 66,799,500.49
  5. Step 5: Solve for x
    x = 66,799,500.49/8,516.79
  6. Step 6: Final answer
    x = 7,843.27

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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.