Home / 13,135.82-18,127.48-7,167.62

Finding the Fourth Proportional to 13,135.82, 18,127.48 and 7,167.62

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Solution

The fourth proportional to 13,135.82, 18,127.48 and 7,167.62 is: 9,891.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.82 : 18,127.48 = 7,167.62 : x
  2. Step 2: Convert to fraction form
    13,135.82/18,127.48 = 7,167.62/x
  3. Step 3: Cross multiply
    13,135.82x = 18,127.48 × 7,167.62
  4. Step 4: Simplify right side
    13,135.82x = 129,930,906.12
  5. Step 5: Solve for x
    x = 129,930,906.12/13,135.82
  6. Step 6: Final answer
    x = 9,891.34

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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.