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Finding the Fourth Proportional to 10,611,993.60, 15,901,660.80 and 7,903,612.80

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Solution

The fourth proportional to 10,611,993.60, 15,901,660.80 and 7,903,612.80 is: 11,843,257.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,611,993.60 : 15,901,660.80 = 7,903,612.80 : x
  2. Step 2: Convert to fraction form
    10,611,993.60/15,901,660.80 = 7,903,612.80/x
  3. Step 3: Cross multiply
    10,611,993.60x = 15,901,660.80 × 7,903,612.80
  4. Step 4: Simplify right side
    10,611,993.60x = 125,680,569,840,138.25
  5. Step 5: Solve for x
    x = 125,680,569,840,138.25/10,611,993.60
  6. Step 6: Final answer
    x = 11,843,257.22

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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.