Home / 21,303,011.80-31,954,517.70-12,778,960.60

Finding the Fourth Proportional to 21,303,011.80, 31,954,517.70 and 12,778,960.60

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Solution

The fourth proportional to 21,303,011.80, 31,954,517.70 and 12,778,960.60 is: 19,168,440.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303,011.80 : 31,954,517.70 = 12,778,960.60 : x
  2. Step 2: Convert to fraction form
    21,303,011.80/31,954,517.70 = 12,778,960.60/x
  3. Step 3: Cross multiply
    21,303,011.80x = 31,954,517.70 × 12,778,960.60
  4. Step 4: Simplify right side
    21,303,011.80x = 408,345,522,680,302.62
  5. Step 5: Solve for x
    x = 408,345,522,680,302.62/21,303,011.80
  6. Step 6: Final answer
    x = 19,168,440.90

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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.