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Finding the Fourth Proportional to 19,677.89, 29,505.89 and 7,977.44

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Solution

The fourth proportional to 19,677.89, 29,505.89 and 7,977.44 is: 11,961.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,677.89 : 29,505.89 = 7,977.44 : x
  2. Step 2: Convert to fraction form
    19,677.89/29,505.89 = 7,977.44/x
  3. Step 3: Cross multiply
    19,677.89x = 29,505.89 × 7,977.44
  4. Step 4: Simplify right side
    19,677.89x = 235,381,560.83
  5. Step 5: Solve for x
    x = 235,381,560.83/19,677.89
  6. Step 6: Final answer
    x = 11,961.73

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1.5x scale

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.