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Finding the Fourth Proportional to 13,396.53, 18,491.99 and 9,144.54

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Solution

The fourth proportional to 13,396.53, 18,491.99 and 9,144.54 is: 12,622.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,396.53 : 18,491.99 = 9,144.54 : x
  2. Step 2: Convert to fraction form
    13,396.53/18,491.99 = 9,144.54/x
  3. Step 3: Cross multiply
    13,396.53x = 18,491.99 × 9,144.54
  4. Step 4: Simplify right side
    13,396.53x = 169,100,696.51
  5. Step 5: Solve for x
    x = 169,100,696.51/13,396.53
  6. Step 6: Final answer
    x = 12,622.72

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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.