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Finding the Fourth Proportional to 7,771.10, 11,661.10 and 2,840.08

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Solution

The fourth proportional to 7,771.10, 11,661.10 and 2,840.08 is: 4,261.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,771.10 : 11,661.10 = 2,840.08 : x
  2. Step 2: Convert to fraction form
    7,771.10/11,661.10 = 2,840.08/x
  3. Step 3: Cross multiply
    7,771.10x = 11,661.10 × 2,840.08
  4. Step 4: Simplify right side
    7,771.10x = 33,118,456.89
  5. Step 5: Solve for x
    x = 33,118,456.89/7,771.10
  6. Step 6: Final answer
    x = 4,261.75

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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.