Home / 13,420,455.70-18,520,753.20-7,619,777.18

Finding the Fourth Proportional to 13,420,455.70, 18,520,753.20 and 7,619,777.18

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Solution

The fourth proportional to 13,420,455.70, 18,520,753.20 and 7,619,777.18 is: 10,515,590.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,420,455.70 : 18,520,753.20 = 7,619,777.18 : x
  2. Step 2: Convert to fraction form
    13,420,455.70/18,520,753.20 = 7,619,777.18/x
  3. Step 3: Cross multiply
    13,420,455.70x = 18,520,753.20 × 7,619,777.18
  4. Step 4: Simplify right side
    13,420,455.70x = 141,124,012,589,771.97
  5. Step 5: Solve for x
    x = 141,124,012,589,771.97/13,420,455.70
  6. Step 6: Final answer
    x = 10,515,590.21

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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.