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Finding the Fourth Proportional to 15,542.69, 21,448.92 and 8,469.12

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Solution

The fourth proportional to 15,542.69, 21,448.92 and 8,469.12 is: 11,687.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,542.69 : 21,448.92 = 8,469.12 : x
  2. Step 2: Convert to fraction form
    15,542.69/21,448.92 = 8,469.12/x
  3. Step 3: Cross multiply
    15,542.69x = 21,448.92 × 8,469.12
  4. Step 4: Simplify right side
    15,542.69x = 181,653,477.35
  5. Step 5: Solve for x
    x = 181,653,477.35/15,542.69
  6. Step 6: Final answer
    x = 11,687.39

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Half scale
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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.