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Finding the Fourth Proportional to 12,172.80, 18,266.40 and 8,024.80

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Solution

The fourth proportional to 12,172.80, 18,266.40 and 8,024.80 is: 12,041.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.80 : 18,266.40 = 8,024.80 : x
  2. Step 2: Convert to fraction form
    12,172.80/18,266.40 = 8,024.80/x
  3. Step 3: Cross multiply
    12,172.80x = 18,266.40 × 8,024.80
  4. Step 4: Simplify right side
    12,172.80x = 146,584,206.72
  5. Step 5: Solve for x
    x = 146,584,206.72/12,172.80
  6. Step 6: Final answer
    x = 12,041.95

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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.