Home / 13,150.40-19,696.80-11,691.20

Finding the Fourth Proportional to 13,150.40, 19,696.80 and 11,691.20

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Solution

The fourth proportional to 13,150.40, 19,696.80 and 11,691.20 is: 17,511.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,150.40 : 19,696.80 = 11,691.20 : x
  2. Step 2: Convert to fraction form
    13,150.40/19,696.80 = 11,691.20/x
  3. Step 3: Cross multiply
    13,150.40x = 19,696.80 × 11,691.20
  4. Step 4: Simplify right side
    13,150.40x = 230,279,228.16
  5. Step 5: Solve for x
    x = 230,279,228.16/13,150.40
  6. Step 6: Final answer
    x = 17,511.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.