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Finding the Fourth Proportional to 40,488.56, 60,742.50 and 12,786.56

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Solution

The fourth proportional to 40,488.56, 60,742.50 and 12,786.56 is: 19,182.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,488.56 : 60,742.50 = 12,786.56 : x
  2. Step 2: Convert to fraction form
    40,488.56/60,742.50 = 12,786.56/x
  3. Step 3: Cross multiply
    40,488.56x = 60,742.50 × 12,786.56
  4. Step 4: Simplify right side
    40,488.56x = 776,687,620.80
  5. Step 5: Solve for x
    x = 776,687,620.80/40,488.56
  6. Step 6: Final answer
    x = 19,182.89

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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.