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Finding the Fourth Proportional to 8,718.16, 12,029.16 and 6,361.60

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Solution

The fourth proportional to 8,718.16, 12,029.16 and 6,361.60 is: 8,777.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.16 : 12,029.16 = 6,361.60 : x
  2. Step 2: Convert to fraction form
    8,718.16/12,029.16 = 6,361.60/x
  3. Step 3: Cross multiply
    8,718.16x = 12,029.16 × 6,361.60
  4. Step 4: Simplify right side
    8,718.16x = 76,524,704.26
  5. Step 5: Solve for x
    x = 76,524,704.26/8,718.16
  6. Step 6: Final answer
    x = 8,777.62

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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.