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Finding the Fourth Proportional to 8,498.70, 11,720.42 and 5,626.21

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Solution

The fourth proportional to 8,498.70, 11,720.42 and 5,626.21 is: 7,759.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,498.70 : 11,720.42 = 5,626.21 : x
  2. Step 2: Convert to fraction form
    8,498.70/11,720.42 = 5,626.21/x
  3. Step 3: Cross multiply
    8,498.70x = 11,720.42 × 5,626.21
  4. Step 4: Simplify right side
    8,498.70x = 65,941,516.08
  5. Step 5: Solve for x
    x = 65,941,516.08/8,498.70
  6. Step 6: Final answer
    x = 7,759.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.