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Finding the Fourth Proportional to 13,212.81, 19,792.81 and 7,944.94

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Solution

The fourth proportional to 13,212.81, 19,792.81 and 7,944.94 is: 11,901.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,212.81 : 19,792.81 = 7,944.94 : x
  2. Step 2: Convert to fraction form
    13,212.81/19,792.81 = 7,944.94/x
  3. Step 3: Cross multiply
    13,212.81x = 19,792.81 × 7,944.94
  4. Step 4: Simplify right side
    13,212.81x = 157,252,618.54
  5. Step 5: Solve for x
    x = 157,252,618.54/13,212.81
  6. Step 6: Final answer
    x = 11,901.52

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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.