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Finding the Fourth Proportional to 18,636.51, 27,960.51 and 6,465.87

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Solution

The fourth proportional to 18,636.51, 27,960.51 and 6,465.87 is: 9,700.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,636.51 : 27,960.51 = 6,465.87 : x
  2. Step 2: Convert to fraction form
    18,636.51/27,960.51 = 6,465.87/x
  3. Step 3: Cross multiply
    18,636.51x = 27,960.51 × 6,465.87
  4. Step 4: Simplify right side
    18,636.51x = 180,789,022.79
  5. Step 5: Solve for x
    x = 180,789,022.79/18,636.51
  6. Step 6: Final answer
    x = 9,700.80

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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.