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Finding the Fourth Proportional to 13,021.20, 19,510.20 and 11,163.60

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Solution

The fourth proportional to 13,021.20, 19,510.20 and 11,163.60 is: 16,726.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,021.20 : 19,510.20 = 11,163.60 : x
  2. Step 2: Convert to fraction form
    13,021.20/19,510.20 = 11,163.60/x
  3. Step 3: Cross multiply
    13,021.20x = 19,510.20 × 11,163.60
  4. Step 4: Simplify right side
    13,021.20x = 217,804,068.72
  5. Step 5: Solve for x
    x = 217,804,068.72/13,021.20
  6. Step 6: Final answer
    x = 16,726.88

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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.