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Finding the Fourth Proportional to 13,008.40, 19,469.40 and 11,453.20

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Solution

The fourth proportional to 13,008.40, 19,469.40 and 11,453.20 is: 17,141.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,008.40 : 19,469.40 = 11,453.20 : x
  2. Step 2: Convert to fraction form
    13,008.40/19,469.40 = 11,453.20/x
  3. Step 3: Cross multiply
    13,008.40x = 19,469.40 × 11,453.20
  4. Step 4: Simplify right side
    13,008.40x = 222,986,932.08
  5. Step 5: Solve for x
    x = 222,986,932.08/13,008.40
  6. Step 6: Final answer
    x = 17,141.76

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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.