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Finding the Fourth Proportional to 13,361.64, 18,439.78 and 8,395.24

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Solution

The fourth proportional to 13,361.64, 18,439.78 and 8,395.24 is: 11,585.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.64 : 18,439.78 = 8,395.24 : x
  2. Step 2: Convert to fraction form
    13,361.64/18,439.78 = 8,395.24/x
  3. Step 3: Cross multiply
    13,361.64x = 18,439.78 × 8,395.24
  4. Step 4: Simplify right side
    13,361.64x = 154,806,378.65
  5. Step 5: Solve for x
    x = 154,806,378.65/13,361.64
  6. Step 6: Final answer
    x = 11,585.88

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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.