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Finding the Fourth Proportional to 15,664.61, 21,616.86 and 8,858.54

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Solution

The fourth proportional to 15,664.61, 21,616.86 and 8,858.54 is: 12,224.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,664.61 : 21,616.86 = 8,858.54 : x
  2. Step 2: Convert to fraction form
    15,664.61/21,616.86 = 8,858.54/x
  3. Step 3: Cross multiply
    15,664.61x = 21,616.86 × 8,858.54
  4. Step 4: Simplify right side
    15,664.61x = 191,493,710.90
  5. Step 5: Solve for x
    x = 191,493,710.90/15,664.61
  6. Step 6: Final answer
    x = 12,224.61

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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.