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Finding the Fourth Proportional to 14,927.31, 20,601.54 and 8,639.73

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Solution

The fourth proportional to 14,927.31, 20,601.54 and 8,639.73 is: 11,923.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,927.31 : 20,601.54 = 8,639.73 : x
  2. Step 2: Convert to fraction form
    14,927.31/20,601.54 = 8,639.73/x
  3. Step 3: Cross multiply
    14,927.31x = 20,601.54 × 8,639.73
  4. Step 4: Simplify right side
    14,927.31x = 177,991,743.18
  5. Step 5: Solve for x
    x = 177,991,743.18/14,927.31
  6. Step 6: Final answer
    x = 11,923.90

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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.