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Finding the Fourth Proportional to 15,618.63, 21,553.65 and 8,448.56

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Solution

The fourth proportional to 15,618.63, 21,553.65 and 8,448.56 is: 11,658.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,618.63 : 21,553.65 = 8,448.56 : x
  2. Step 2: Convert to fraction form
    15,618.63/21,553.65 = 8,448.56/x
  3. Step 3: Cross multiply
    15,618.63x = 21,553.65 × 8,448.56
  4. Step 4: Simplify right side
    15,618.63x = 182,097,197.48
  5. Step 5: Solve for x
    x = 182,097,197.48/15,618.63
  6. Step 6: Final answer
    x = 11,658.97

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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.