Home / 13,130.82-18,121.11-7,162.26

Finding the Fourth Proportional to 13,130.82, 18,121.11 and 7,162.26

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Solution

The fourth proportional to 13,130.82, 18,121.11 and 7,162.26 is: 9,884.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,130.82 : 18,121.11 = 7,162.26 : x
  2. Step 2: Convert to fraction form
    13,130.82/18,121.11 = 7,162.26/x
  3. Step 3: Cross multiply
    13,130.82x = 18,121.11 × 7,162.26
  4. Step 4: Simplify right side
    13,130.82x = 129,788,101.31
  5. Step 5: Solve for x
    x = 129,788,101.31/13,130.82
  6. Step 6: Final answer
    x = 9,884.23

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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.