Home / 13,578.36-18,732.72-7,912.26

Finding the Fourth Proportional to 13,578.36, 18,732.72 and 7,912.26

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Solution

The fourth proportional to 13,578.36, 18,732.72 and 7,912.26 is: 10,915.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,578.36 : 18,732.72 = 7,912.26 : x
  2. Step 2: Convert to fraction form
    13,578.36/18,732.72 = 7,912.26/x
  3. Step 3: Cross multiply
    13,578.36x = 18,732.72 × 7,912.26
  4. Step 4: Simplify right side
    13,578.36x = 148,218,151.15
  5. Step 5: Solve for x
    x = 148,218,151.15/13,578.36
  6. Step 6: Final answer
    x = 10,915.76

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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.