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Finding the Fourth Proportional to 46,991.73, 70,490.82 and 18,912

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Solution

The fourth proportional to 46,991.73, 70,490.82 and 18,912 is: 28,369.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    46,991.73 : 70,490.82 = 18,912 : x
  2. Step 2: Convert to fraction form
    46,991.73/70,490.82 = 18,912/x
  3. Step 3: Cross multiply
    46,991.73x = 70,490.82 × 18,912
  4. Step 4: Simplify right side
    46,991.73x = 1,333,122,387.84
  5. Step 5: Solve for x
    x = 1,333,122,387.84/46,991.73
  6. Step 6: Final answer
    x = 28,369.30

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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.