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Finding the Fourth Proportional to 13,299.21, 19,929.96 and 7,378.68

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Solution

The fourth proportional to 13,299.21, 19,929.96 and 7,378.68 is: 11,057.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,299.21 : 19,929.96 = 7,378.68 : x
  2. Step 2: Convert to fraction form
    13,299.21/19,929.96 = 7,378.68/x
  3. Step 3: Cross multiply
    13,299.21x = 19,929.96 × 7,378.68
  4. Step 4: Simplify right side
    13,299.21x = 147,056,797.25
  5. Step 5: Solve for x
    x = 147,056,797.25/13,299.21
  6. Step 6: Final answer
    x = 11,057.56

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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.