Home / 13,137.92-18,129.66-7,169.30

Finding the Fourth Proportional to 13,137.92, 18,129.66 and 7,169.30

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Solution

The fourth proportional to 13,137.92, 18,129.66 and 7,169.30 is: 9,893.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.92 : 18,129.66 = 7,169.30 : x
  2. Step 2: Convert to fraction form
    13,137.92/18,129.66 = 7,169.30/x
  3. Step 3: Cross multiply
    13,137.92x = 18,129.66 × 7,169.30
  4. Step 4: Simplify right side
    13,137.92x = 129,976,971.44
  5. Step 5: Solve for x
    x = 129,976,971.44/13,137.92
  6. Step 6: Final answer
    x = 9,893.27

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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.