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Finding the Fourth Proportional to 39,858.56, 59,787.84 and 12,156.56

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Solution

The fourth proportional to 39,858.56, 59,787.84 and 12,156.56 is: 18,234.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,858.56 : 59,787.84 = 12,156.56 : x
  2. Step 2: Convert to fraction form
    39,858.56/59,787.84 = 12,156.56/x
  3. Step 3: Cross multiply
    39,858.56x = 59,787.84 × 12,156.56
  4. Step 4: Simplify right side
    39,858.56x = 726,814,464.23
  5. Step 5: Solve for x
    x = 726,814,464.23/39,858.56
  6. Step 6: Final answer
    x = 18,234.84

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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.