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Finding the Fourth Proportional to 11,172.99, 15,418.22 and 6,699.21

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Solution

The fourth proportional to 11,172.99, 15,418.22 and 6,699.21 is: 9,244.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,172.99 : 15,418.22 = 6,699.21 : x
  2. Step 2: Convert to fraction form
    11,172.99/15,418.22 = 6,699.21/x
  3. Step 3: Cross multiply
    11,172.99x = 15,418.22 × 6,699.21
  4. Step 4: Simplify right side
    11,172.99x = 103,289,858.82
  5. Step 5: Solve for x
    x = 103,289,858.82/11,172.99
  6. Step 6: Final answer
    x = 9,244.60

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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.