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Finding the Fourth Proportional to 15,361.70, 21,202.18 and 8,988.98

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Solution

The fourth proportional to 15,361.70, 21,202.18 and 8,988.98 is: 12,406.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,361.70 : 21,202.18 = 8,988.98 : x
  2. Step 2: Convert to fraction form
    15,361.70/21,202.18 = 8,988.98/x
  3. Step 3: Cross multiply
    15,361.70x = 21,202.18 × 8,988.98
  4. Step 4: Simplify right side
    15,361.70x = 190,585,843.49
  5. Step 5: Solve for x
    x = 190,585,843.49/15,361.70
  6. Step 6: Final answer
    x = 12,406.56

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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.