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Finding the Fourth Proportional to 12,843,690.58, 17,729,944.50 and 8,991,333.82

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Solution

The fourth proportional to 12,843,690.58, 17,729,944.50 and 8,991,333.82 is: 12,411,997.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,843,690.58 : 17,729,944.50 = 8,991,333.82 : x
  2. Step 2: Convert to fraction form
    12,843,690.58/17,729,944.50 = 8,991,333.82/x
  3. Step 3: Cross multiply
    12,843,690.58x = 17,729,944.50 × 8,991,333.82
  4. Step 4: Simplify right side
    12,843,690.58x = 159,415,849,609,573
  5. Step 5: Solve for x
    x = 159,415,849,609,573/12,843,690.58
  6. Step 6: Final answer
    x = 12,411,997.05

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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.