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Finding the Fourth Proportional to 15,674.87, 21,631.70 and 8,601.29

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Solution

The fourth proportional to 15,674.87, 21,631.70 and 8,601.29 is: 11,869.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,674.87 : 21,631.70 = 8,601.29 : x
  2. Step 2: Convert to fraction form
    15,674.87/21,631.70 = 8,601.29/x
  3. Step 3: Cross multiply
    15,674.87x = 21,631.70 × 8,601.29
  4. Step 4: Simplify right side
    15,674.87x = 186,060,373.73
  5. Step 5: Solve for x
    x = 186,060,373.73/15,674.87
  6. Step 6: Final answer
    x = 11,869.98

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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.