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Finding the Fourth Proportional to 8,720.69, 13,081.08 and 2,146.83

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Solution

The fourth proportional to 8,720.69, 13,081.08 and 2,146.83 is: 3,220.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.69 : 13,081.08 = 2,146.83 : x
  2. Step 2: Convert to fraction form
    8,720.69/13,081.08 = 2,146.83/x
  3. Step 3: Cross multiply
    8,720.69x = 13,081.08 × 2,146.83
  4. Step 4: Simplify right side
    8,720.69x = 28,082,863.03
  5. Step 5: Solve for x
    x = 28,082,863.03/8,720.69
  6. Step 6: Final answer
    x = 3,220.26

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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.