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Finding the Fourth Proportional to 8,718.68, 13,078.11 and 3,454.97

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Solution

The fourth proportional to 8,718.68, 13,078.11 and 3,454.97 is: 5,182.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,718.68 : 13,078.11 = 3,454.97 : x
  2. Step 2: Convert to fraction form
    8,718.68/13,078.11 = 3,454.97/x
  3. Step 3: Cross multiply
    8,718.68x = 13,078.11 × 3,454.97
  4. Step 4: Simplify right side
    8,718.68x = 45,184,477.71
  5. Step 5: Solve for x
    x = 45,184,477.71/8,718.68
  6. Step 6: Final answer
    x = 5,182.49

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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.