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Finding the Fourth Proportional to 39,860.81, 59,787.54 and 12,158.81

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Solution

The fourth proportional to 39,860.81, 59,787.54 and 12,158.81 is: 18,237.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,860.81 : 59,787.54 = 12,158.81 : x
  2. Step 2: Convert to fraction form
    39,860.81/59,787.54 = 12,158.81/x
  3. Step 3: Cross multiply
    39,860.81x = 59,787.54 × 12,158.81
  4. Step 4: Simplify right side
    39,860.81x = 726,945,040.29
  5. Step 5: Solve for x
    x = 726,945,040.29/39,860.81
  6. Step 6: Final answer
    x = 18,237.09

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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.