Home / 13,146,789.20-19,720,183.80-7,478,085.20

Finding the Fourth Proportional to 13,146,789.20, 19,720,183.80 and 7,478,085.20

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Solution

The fourth proportional to 13,146,789.20, 19,720,183.80 and 7,478,085.20 is: 11,217,127.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146,789.20 : 19,720,183.80 = 7,478,085.20 : x
  2. Step 2: Convert to fraction form
    13,146,789.20/19,720,183.80 = 7,478,085.20/x
  3. Step 3: Cross multiply
    13,146,789.20x = 19,720,183.80 × 7,478,085.20
  4. Step 4: Simplify right side
    13,146,789.20x = 147,469,214,616,059.78
  5. Step 5: Solve for x
    x = 147,469,214,616,059.78/13,146,789.20
  6. Step 6: Final answer
    x = 11,217,127.80

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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.