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Finding the Fourth Proportional to 19,219.44, 28,821.06 and 8,125.68

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Solution

The fourth proportional to 19,219.44, 28,821.06 and 8,125.68 is: 12,185.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,219.44 : 28,821.06 = 8,125.68 : x
  2. Step 2: Convert to fraction form
    19,219.44/28,821.06 = 8,125.68/x
  3. Step 3: Cross multiply
    19,219.44x = 28,821.06 × 8,125.68
  4. Step 4: Simplify right side
    19,219.44x = 234,190,710.82
  5. Step 5: Solve for x
    x = 234,190,710.82/19,219.44
  6. Step 6: Final answer
    x = 12,185.10

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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.