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Finding the Fourth Proportional to 7,381,108.80, 11,073,412.80 and 3,787,430.40

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Solution

The fourth proportional to 7,381,108.80, 11,073,412.80 and 3,787,430.40 is: 5,682,043.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,381,108.80 : 11,073,412.80 = 3,787,430.40 : x
  2. Step 2: Convert to fraction form
    7,381,108.80/11,073,412.80 = 3,787,430.40/x
  3. Step 3: Cross multiply
    7,381,108.80x = 11,073,412.80 × 3,787,430.40
  4. Step 4: Simplify right side
    7,381,108.80x = 41,939,780,270,469.12
  5. Step 5: Solve for x
    x = 41,939,780,270,469.12/7,381,108.80
  6. Step 6: Final answer
    x = 5,682,043.36

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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.