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Finding the Fourth Proportional to 8,615.35, 11,887.72 and 5,079.26

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Solution

The fourth proportional to 8,615.35, 11,887.72 and 5,079.26 is: 7,008.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.35 : 11,887.72 = 5,079.26 : x
  2. Step 2: Convert to fraction form
    8,615.35/11,887.72 = 5,079.26/x
  3. Step 3: Cross multiply
    8,615.35x = 11,887.72 × 5,079.26
  4. Step 4: Simplify right side
    8,615.35x = 60,380,820.69
  5. Step 5: Solve for x
    x = 60,380,820.69/8,615.35
  6. Step 6: Final answer
    x = 7,008.52

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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.