Home / 13,129.82-18,118.58-7,161.52

Finding the Fourth Proportional to 13,129.82, 18,118.58 and 7,161.52

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Solution

The fourth proportional to 13,129.82, 18,118.58 and 7,161.52 is: 9,882.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.82 : 18,118.58 = 7,161.52 : x
  2. Step 2: Convert to fraction form
    13,129.82/18,118.58 = 7,161.52/x
  3. Step 3: Cross multiply
    13,129.82x = 18,118.58 × 7,161.52
  4. Step 4: Simplify right side
    13,129.82x = 129,756,573.04
  5. Step 5: Solve for x
    x = 129,756,573.04/13,129.82
  6. Step 6: Final answer
    x = 9,882.59

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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.