Home / 13,579.72-18,739.24-7,915.39

Finding the Fourth Proportional to 13,579.72, 18,739.24 and 7,915.39

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Solution

The fourth proportional to 13,579.72, 18,739.24 and 7,915.39 is: 10,922.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,579.72 : 18,739.24 = 7,915.39 : x
  2. Step 2: Convert to fraction form
    13,579.72/18,739.24 = 7,915.39/x
  3. Step 3: Cross multiply
    13,579.72x = 18,739.24 × 7,915.39
  4. Step 4: Simplify right side
    13,579.72x = 148,328,439.75
  5. Step 5: Solve for x
    x = 148,328,439.75/13,579.72
  6. Step 6: Final answer
    x = 10,922.79

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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.