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Finding the Fourth Proportional to 12,911.44, 17,819.40 and 7,324.24

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Solution

The fourth proportional to 12,911.44, 17,819.40 and 7,324.24 is: 10,108.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,911.44 : 17,819.40 = 7,324.24 : x
  2. Step 2: Convert to fraction form
    12,911.44/17,819.40 = 7,324.24/x
  3. Step 3: Cross multiply
    12,911.44x = 17,819.40 × 7,324.24
  4. Step 4: Simplify right side
    12,911.44x = 130,513,562.26
  5. Step 5: Solve for x
    x = 130,513,562.26/12,911.44
  6. Step 6: Final answer
    x = 10,108.37

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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.