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Finding the Fourth Proportional to 13,769.68, 20,628.48 and 7,908.52

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Solution

The fourth proportional to 13,769.68, 20,628.48 and 7,908.52 is: 11,847.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,769.68 : 20,628.48 = 7,908.52 : x
  2. Step 2: Convert to fraction form
    13,769.68/20,628.48 = 7,908.52/x
  3. Step 3: Cross multiply
    13,769.68x = 20,628.48 × 7,908.52
  4. Step 4: Simplify right side
    13,769.68x = 163,140,746.65
  5. Step 5: Solve for x
    x = 163,140,746.65/13,769.68
  6. Step 6: Final answer
    x = 11,847.82

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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.