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Finding the Fourth Proportional to 8,718.77, 13,078.02 and 2,145.01

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Solution

The fourth proportional to 8,718.77, 13,078.02 and 2,145.01 is: 3,217.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.77 : 13,078.02 = 2,145.01 : x
  2. Step 2: Convert to fraction form
    8,718.77/13,078.02 = 2,145.01/x
  3. Step 3: Cross multiply
    8,718.77x = 13,078.02 × 2,145.01
  4. Step 4: Simplify right side
    8,718.77x = 28,052,483.68
  5. Step 5: Solve for x
    x = 28,052,483.68/8,718.77
  6. Step 6: Final answer
    x = 3,217.48

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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.