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Finding the Fourth Proportional to 18,163.52, 25,075.20 and 12,226.40

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Solution

The fourth proportional to 18,163.52, 25,075.20 and 12,226.40 is: 16,878.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,163.52 : 25,075.20 = 12,226.40 : x
  2. Step 2: Convert to fraction form
    18,163.52/25,075.20 = 12,226.40/x
  3. Step 3: Cross multiply
    18,163.52x = 25,075.20 × 12,226.40
  4. Step 4: Simplify right side
    18,163.52x = 306,579,425.28
  5. Step 5: Solve for x
    x = 306,579,425.28/18,163.52
  6. Step 6: Final answer
    x = 16,878.86

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.