Home / 12,128,077.80-18,192,116.70-7,823,405.70

Finding the Fourth Proportional to 12,128,077.80, 18,192,116.70 and 7,823,405.70

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Solution

The fourth proportional to 12,128,077.80, 18,192,116.70 and 7,823,405.70 is: 11,735,108.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128,077.80 : 18,192,116.70 = 7,823,405.70 : x
  2. Step 2: Convert to fraction form
    12,128,077.80/18,192,116.70 = 7,823,405.70/x
  3. Step 3: Cross multiply
    12,128,077.80x = 18,192,116.70 × 7,823,405.70
  4. Step 4: Simplify right side
    12,128,077.80x = 142,324,309,485,845.19
  5. Step 5: Solve for x
    x = 142,324,309,485,845.19/12,128,077.80
  6. Step 6: Final answer
    x = 11,735,108.55

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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.