Home / 7,771.20-11,661.54-3,090.36

Finding the Fourth Proportional to 7,771.20, 11,661.54 and 3,090.36

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Solution

The fourth proportional to 7,771.20, 11,661.54 and 3,090.36 is: 4,637.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,771.20 : 11,661.54 = 3,090.36 : x
  2. Step 2: Convert to fraction form
    7,771.20/11,661.54 = 3,090.36/x
  3. Step 3: Cross multiply
    7,771.20x = 11,661.54 × 3,090.36
  4. Step 4: Simplify right side
    7,771.20x = 36,038,356.75
  5. Step 5: Solve for x
    x = 36,038,356.75/7,771.20
  6. Step 6: Final answer
    x = 4,637.42

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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.