Home / 13,420,455.45-18,520,752.86-7,619,776.94

Finding the Fourth Proportional to 13,420,455.45, 18,520,752.86 and 7,619,776.94

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Solution

The fourth proportional to 13,420,455.45, 18,520,752.86 and 7,619,776.94 is: 10,515,589.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420,455.45 : 18,520,752.86 = 7,619,776.94 : x
  2. Step 2: Convert to fraction form
    13,420,455.45/18,520,752.86 = 7,619,776.94/x
  3. Step 3: Cross multiply
    13,420,455.45x = 18,520,752.86 × 7,619,776.94
  4. Step 4: Simplify right side
    13,420,455.45x = 141,124,005,554,067.06
  5. Step 5: Solve for x
    x = 141,124,005,554,067.06/13,420,455.45
  6. Step 6: Final answer
    x = 10,515,589.88

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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.