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Finding the Fourth Proportional to 15,674.95, 21,631.42 and 8,960.73

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Solution

The fourth proportional to 15,674.95, 21,631.42 and 8,960.73 is: 12,365.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,674.95 : 21,631.42 = 8,960.73 : x
  2. Step 2: Convert to fraction form
    15,674.95/21,631.42 = 8,960.73/x
  3. Step 3: Cross multiply
    15,674.95x = 21,631.42 × 8,960.73
  4. Step 4: Simplify right side
    15,674.95x = 193,833,244.22
  5. Step 5: Solve for x
    x = 193,833,244.22/15,674.95
  6. Step 6: Final answer
    x = 12,365.80

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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.