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Finding the Fourth Proportional to 8,399.70, 12,611.70 and 5,945.40

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Solution

The fourth proportional to 8,399.70, 12,611.70 and 5,945.40 is: 8,926.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,399.70 : 12,611.70 = 5,945.40 : x
  2. Step 2: Convert to fraction form
    8,399.70/12,611.70 = 5,945.40/x
  3. Step 3: Cross multiply
    8,399.70x = 12,611.70 × 5,945.40
  4. Step 4: Simplify right side
    8,399.70x = 74,981,601.18
  5. Step 5: Solve for x
    x = 74,981,601.18/8,399.70
  6. Step 6: Final answer
    x = 8,926.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.