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Finding the Fourth Proportional to 15,361.49, 21,193.06 and 8,986.05

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Solution

The fourth proportional to 15,361.49, 21,193.06 and 8,986.05 is: 12,397.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,361.49 : 21,193.06 = 8,986.05 : x
  2. Step 2: Convert to fraction form
    15,361.49/21,193.06 = 8,986.05/x
  3. Step 3: Cross multiply
    15,361.49x = 21,193.06 × 8,986.05
  4. Step 4: Simplify right side
    15,361.49x = 190,441,745.92
  5. Step 5: Solve for x
    x = 190,441,745.92/15,361.49
  6. Step 6: Final answer
    x = 12,397.35

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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.