Home / 20,805,918.12-28,717,937.10-12,105,771.12

Finding the Fourth Proportional to 20,805,918.12, 28,717,937.10 and 12,105,771.12

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Solution

The fourth proportional to 20,805,918.12, 28,717,937.10 and 12,105,771.12 is: 16,709,321.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,805,918.12 : 28,717,937.10 = 12,105,771.12 : x
  2. Step 2: Convert to fraction form
    20,805,918.12/28,717,937.10 = 12,105,771.12/x
  3. Step 3: Cross multiply
    20,805,918.12x = 28,717,937.10 × 12,105,771.12
  4. Step 4: Simplify right side
    20,805,918.12x = 347,652,773,571,156.56
  5. Step 5: Solve for x
    x = 347,652,773,571,156.56/20,805,918.12
  6. Step 6: Final answer
    x = 16,709,321.43

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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.