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Finding the Fourth Proportional to 8,649.55, 11,936.99 and 4,821.43

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Solution

The fourth proportional to 8,649.55, 11,936.99 and 4,821.43 is: 6,653.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,649.55 : 11,936.99 = 4,821.43 : x
  2. Step 2: Convert to fraction form
    8,649.55/11,936.99 = 4,821.43/x
  3. Step 3: Cross multiply
    8,649.55x = 11,936.99 × 4,821.43
  4. Step 4: Simplify right side
    8,649.55x = 57,553,361.70
  5. Step 5: Solve for x
    x = 57,553,361.70/8,649.55
  6. Step 6: Final answer
    x = 6,653.91

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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.