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Finding the Fourth Proportional to 8,626.68, 12,939.21 and 3,695.40

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Solution

The fourth proportional to 8,626.68, 12,939.21 and 3,695.40 is: 5,542.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,626.68 : 12,939.21 = 3,695.40 : x
  2. Step 2: Convert to fraction form
    8,626.68/12,939.21 = 3,695.40/x
  3. Step 3: Cross multiply
    8,626.68x = 12,939.21 × 3,695.40
  4. Step 4: Simplify right side
    8,626.68x = 47,815,556.63
  5. Step 5: Solve for x
    x = 47,815,556.63/8,626.68
  6. Step 6: Final answer
    x = 5,542.75

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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.