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Finding the Fourth Proportional to 8,642.36, 12,951.12 and 4,936.88

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Solution

The fourth proportional to 8,642.36, 12,951.12 and 4,936.88 is: 7,398.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,642.36 : 12,951.12 = 4,936.88 : x
  2. Step 2: Convert to fraction form
    8,642.36/12,951.12 = 4,936.88/x
  3. Step 3: Cross multiply
    8,642.36x = 12,951.12 × 4,936.88
  4. Step 4: Simplify right side
    8,642.36x = 63,938,125.31
  5. Step 5: Solve for x
    x = 63,938,125.31/8,642.36
  6. Step 6: Final answer
    x = 7,398.23

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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.