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Finding the Fourth Proportional to 9,104.20, 12,771.80 and 9,104.20

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Solution

The fourth proportional to 9,104.20, 12,771.80 and 9,104.20 is: 12,771.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,104.20 : 12,771.80 = 9,104.20 : x
  2. Step 2: Convert to fraction form
    9,104.20/12,771.80 = 9,104.20/x
  3. Step 3: Cross multiply
    9,104.20x = 12,771.80 × 9,104.20
  4. Step 4: Simplify right side
    9,104.20x = 116,277,021.56
  5. Step 5: Solve for x
    x = 116,277,021.56/9,104.20
  6. Step 6: Final answer
    x = 12,771.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.