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Finding the Fourth Proportional to 8,618.28, 11,859.03 and 8,361.36

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Solution

The fourth proportional to 8,618.28, 11,859.03 and 8,361.36 is: 11,505.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,618.28 : 11,859.03 = 8,361.36 : x
  2. Step 2: Convert to fraction form
    8,618.28/11,859.03 = 8,361.36/x
  3. Step 3: Cross multiply
    8,618.28x = 11,859.03 × 8,361.36
  4. Step 4: Simplify right side
    8,618.28x = 99,157,619.08
  5. Step 5: Solve for x
    x = 99,157,619.08/8,618.28
  6. Step 6: Final answer
    x = 11,505.50

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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.