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Finding the Fourth Proportional to 8,388.40, 11,555.98 and 5,865.80

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Solution

The fourth proportional to 8,388.40, 11,555.98 and 5,865.80 is: 8,080.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,388.40 : 11,555.98 = 5,865.80 : x
  2. Step 2: Convert to fraction form
    8,388.40/11,555.98 = 5,865.80/x
  3. Step 3: Cross multiply
    8,388.40x = 11,555.98 × 5,865.80
  4. Step 4: Simplify right side
    8,388.40x = 67,785,067.48
  5. Step 5: Solve for x
    x = 67,785,067.48/8,388.40
  6. Step 6: Final answer
    x = 8,080.81

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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.