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Finding the Fourth Proportional to 15,616, 21,552.64 and 8,995.84

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Solution

The fourth proportional to 15,616, 21,552.64 and 8,995.84 is: 12,415.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,616 : 21,552.64 = 8,995.84 : x
  2. Step 2: Convert to fraction form
    15,616/21,552.64 = 8,995.84/x
  3. Step 3: Cross multiply
    15,616x = 21,552.64 × 8,995.84
  4. Step 4: Simplify right side
    15,616x = 193,884,101.02
  5. Step 5: Solve for x
    x = 193,884,101.02/15,616
  6. Step 6: Final answer
    x = 12,415.73

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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.