Home / 13,137.25-18,129.34-7,168.90

Finding the Fourth Proportional to 13,137.25, 18,129.34 and 7,168.90

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Solution

The fourth proportional to 13,137.25, 18,129.34 and 7,168.90 is: 9,893.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.25 : 18,129.34 = 7,168.90 : x
  2. Step 2: Convert to fraction form
    13,137.25/18,129.34 = 7,168.90/x
  3. Step 3: Cross multiply
    13,137.25x = 18,129.34 × 7,168.90
  4. Step 4: Simplify right side
    13,137.25x = 129,967,425.53
  5. Step 5: Solve for x
    x = 129,967,425.53/13,137.25
  6. Step 6: Final answer
    x = 9,893.05

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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.