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Finding the Fourth Proportional to 7,777.78, 11,660.06 and 3,620.21

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Solution

The fourth proportional to 7,777.78, 11,660.06 and 3,620.21 is: 5,427.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,777.78 : 11,660.06 = 3,620.21 : x
  2. Step 2: Convert to fraction form
    7,777.78/11,660.06 = 3,620.21/x
  3. Step 3: Cross multiply
    7,777.78x = 11,660.06 × 3,620.21
  4. Step 4: Simplify right side
    7,777.78x = 42,211,807.51
  5. Step 5: Solve for x
    x = 42,211,807.51/7,777.78
  6. Step 6: Final answer
    x = 5,427.23

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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.