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Finding the Fourth Proportional to 11,359.44, 15,668.64 and 6,642

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Solution

The fourth proportional to 11,359.44, 15,668.64 and 6,642 is: 9,161.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,359.44 : 15,668.64 = 6,642 : x
  2. Step 2: Convert to fraction form
    11,359.44/15,668.64 = 6,642/x
  3. Step 3: Cross multiply
    11,359.44x = 15,668.64 × 6,642
  4. Step 4: Simplify right side
    11,359.44x = 104,071,106.88
  5. Step 5: Solve for x
    x = 104,071,106.88/11,359.44
  6. Step 6: Final answer
    x = 9,161.64

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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.