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Finding the Fourth Proportional to 9,621, 14,389.81 and 5,662.82

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Solution

The fourth proportional to 9,621, 14,389.81 and 5,662.82 is: 8,469.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,621 : 14,389.81 = 5,662.82 : x
  2. Step 2: Convert to fraction form
    9,621/14,389.81 = 5,662.82/x
  3. Step 3: Cross multiply
    9,621x = 14,389.81 × 5,662.82
  4. Step 4: Simplify right side
    9,621x = 81,486,925.68
  5. Step 5: Solve for x
    x = 81,486,925.68/9,621
  6. Step 6: Final answer
    x = 8,469.69

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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.