Home / 20,679,641.70-28,519,327.71-12,945,389.10

Finding the Fourth Proportional to 20,679,641.70, 28,519,327.71 and 12,945,389.10

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Solution

The fourth proportional to 20,679,641.70, 28,519,327.71 and 12,945,389.10 is: 17,853,007.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,679,641.70 : 28,519,327.71 = 12,945,389.10 : x
  2. Step 2: Convert to fraction form
    20,679,641.70/28,519,327.71 = 12,945,389.10/x
  3. Step 3: Cross multiply
    20,679,641.70x = 28,519,327.71 × 12,945,389.10
  4. Step 4: Simplify right side
    20,679,641.70x = 369,193,794,076,361.94
  5. Step 5: Solve for x
    x = 369,193,794,076,361.94/20,679,641.70
  6. Step 6: Final answer
    x = 17,853,007.29

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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.