Home / 13,289,772.88-18,339,899.44-7,178,201.28

Finding the Fourth Proportional to 13,289,772.88, 18,339,899.44 and 7,178,201.28

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Solution

The fourth proportional to 13,289,772.88, 18,339,899.44 and 7,178,201.28 is: 9,905,924.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,289,772.88 : 18,339,899.44 = 7,178,201.28 : x
  2. Step 2: Convert to fraction form
    13,289,772.88/18,339,899.44 = 7,178,201.28/x
  3. Step 3: Cross multiply
    13,289,772.88x = 18,339,899.44 × 7,178,201.28
  4. Step 4: Simplify right side
    13,289,772.88x = 131,647,489,635,279.30
  5. Step 5: Solve for x
    x = 131,647,489,635,279.30/13,289,772.88
  6. Step 6: Final answer
    x = 9,905,924.72

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.