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Finding the Fourth Proportional to 15,872.73, 21,905.06 and 8,798.66

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Solution

The fourth proportional to 15,872.73, 21,905.06 and 8,798.66 is: 12,142.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,872.73 : 21,905.06 = 8,798.66 : x
  2. Step 2: Convert to fraction form
    15,872.73/21,905.06 = 8,798.66/x
  3. Step 3: Cross multiply
    15,872.73x = 21,905.06 × 8,798.66
  4. Step 4: Simplify right side
    15,872.73x = 192,735,021.70
  5. Step 5: Solve for x
    x = 192,735,021.70/15,872.73
  6. Step 6: Final answer
    x = 12,142.53

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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.