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Finding the Fourth Proportional to 28,491,203.80, 42,736,805.70 and 12,305,872.90

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Solution

The fourth proportional to 28,491,203.80, 42,736,805.70 and 12,305,872.90 is: 18,458,809.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,491,203.80 : 42,736,805.70 = 12,305,872.90 : x
  2. Step 2: Convert to fraction form
    28,491,203.80/42,736,805.70 = 12,305,872.90/x
  3. Step 3: Cross multiply
    28,491,203.80x = 42,736,805.70 × 12,305,872.90
  4. Step 4: Simplify right side
    28,491,203.80x = 525,913,699,096,195.56
  5. Step 5: Solve for x
    x = 525,913,699,096,195.56/28,491,203.80
  6. Step 6: Final answer
    x = 18,458,809.35

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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.