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Finding the Fourth Proportional to 8,518.72, 12,776.72 and 4,361.80

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Solution

The fourth proportional to 8,518.72, 12,776.72 and 4,361.80 is: 6,542.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,518.72 : 12,776.72 = 4,361.80 : x
  2. Step 2: Convert to fraction form
    8,518.72/12,776.72 = 4,361.80/x
  3. Step 3: Cross multiply
    8,518.72x = 12,776.72 × 4,361.80
  4. Step 4: Simplify right side
    8,518.72x = 55,729,497.30
  5. Step 5: Solve for x
    x = 55,729,497.30/8,518.72
  6. Step 6: Final answer
    x = 6,542.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.