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Finding the Fourth Proportional to 13,361.79, 18,440.64 and 7,696.75

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Solution

The fourth proportional to 13,361.79, 18,440.64 and 7,696.75 is: 10,622.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,361.79 : 18,440.64 = 7,696.75 : x
  2. Step 2: Convert to fraction form
    13,361.79/18,440.64 = 7,696.75/x
  3. Step 3: Cross multiply
    13,361.79x = 18,440.64 × 7,696.75
  4. Step 4: Simplify right side
    13,361.79x = 141,932,995.92
  5. Step 5: Solve for x
    x = 141,932,995.92/13,361.79
  6. Step 6: Final answer
    x = 10,622.30

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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.