Home / 13,131.70-18,122.22-7,467.40

Finding the Fourth Proportional to 13,131.70, 18,122.22 and 7,467.40

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Solution

The fourth proportional to 13,131.70, 18,122.22 and 7,467.40 is: 10,305.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.70 : 18,122.22 = 7,467.40 : x
  2. Step 2: Convert to fraction form
    13,131.70/18,122.22 = 7,467.40/x
  3. Step 3: Cross multiply
    13,131.70x = 18,122.22 × 7,467.40
  4. Step 4: Simplify right side
    13,131.70x = 135,325,865.63
  5. Step 5: Solve for x
    x = 135,325,865.63/13,131.70
  6. Step 6: Final answer
    x = 10,305.28

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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.