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Finding the Fourth Proportional to 8,642.12, 12,906.49 and 8,551.40

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Solution

The fourth proportional to 8,642.12, 12,906.49 and 8,551.40 is: 12,771.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.12 : 12,906.49 = 8,551.40 : x
  2. Step 2: Convert to fraction form
    8,642.12/12,906.49 = 8,551.40/x
  3. Step 3: Cross multiply
    8,642.12x = 12,906.49 × 8,551.40
  4. Step 4: Simplify right side
    8,642.12x = 110,368,558.59
  5. Step 5: Solve for x
    x = 110,368,558.59/8,642.12
  6. Step 6: Final answer
    x = 12,771.01

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.