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Finding the Fourth Proportional to 40,491.56, 60,747 and 12,789.56

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Solution

The fourth proportional to 40,491.56, 60,747 and 12,789.56 is: 19,187.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,491.56 : 60,747 = 12,789.56 : x
  2. Step 2: Convert to fraction form
    40,491.56/60,747 = 12,789.56/x
  3. Step 3: Cross multiply
    40,491.56x = 60,747 × 12,789.56
  4. Step 4: Simplify right side
    40,491.56x = 776,927,401.32
  5. Step 5: Solve for x
    x = 776,927,401.32/40,491.56
  6. Step 6: Final answer
    x = 19,187.39

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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.