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Finding the Fourth Proportional to 8,615.78, 11,889.75 and 5,033.20

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Solution

The fourth proportional to 8,615.78, 11,889.75 and 5,033.20 is: 6,945.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.78 : 11,889.75 = 5,033.20 : x
  2. Step 2: Convert to fraction form
    8,615.78/11,889.75 = 5,033.20/x
  3. Step 3: Cross multiply
    8,615.78x = 11,889.75 × 5,033.20
  4. Step 4: Simplify right side
    8,615.78x = 59,843,467.70
  5. Step 5: Solve for x
    x = 59,843,467.70/8,615.78
  6. Step 6: Final answer
    x = 6,945.80

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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.