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Finding the Fourth Proportional to 19,313.12, 28,950 and 7,621.60

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Solution

The fourth proportional to 19,313.12, 28,950 and 7,621.60 is: 11,424.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,313.12 : 28,950 = 7,621.60 : x
  2. Step 2: Convert to fraction form
    19,313.12/28,950 = 7,621.60/x
  3. Step 3: Cross multiply
    19,313.12x = 28,950 × 7,621.60
  4. Step 4: Simplify right side
    19,313.12x = 220,645,320
  5. Step 5: Solve for x
    x = 220,645,320/19,313.12
  6. Step 6: Final answer
    x = 11,424.63

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.