Home / 7,782.80-11,670.08-3,395.12

Finding the Fourth Proportional to 7,782.80, 11,670.08 and 3,395.12

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Solution

The fourth proportional to 7,782.80, 11,670.08 and 3,395.12 is: 5,090.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,782.80 : 11,670.08 = 3,395.12 : x
  2. Step 2: Convert to fraction form
    7,782.80/11,670.08 = 3,395.12/x
  3. Step 3: Cross multiply
    7,782.80x = 11,670.08 × 3,395.12
  4. Step 4: Simplify right side
    7,782.80x = 39,621,246.68
  5. Step 5: Solve for x
    x = 39,621,246.68/7,782.80
  6. Step 6: Final answer
    x = 5,090.88

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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.