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Finding the Fourth Proportional to 11,980.56, 17,970.84 and 3,216.36

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Solution

The fourth proportional to 11,980.56, 17,970.84 and 3,216.36 is: 4,824.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,980.56 : 17,970.84 = 3,216.36 : x
  2. Step 2: Convert to fraction form
    11,980.56/17,970.84 = 3,216.36/x
  3. Step 3: Cross multiply
    11,980.56x = 17,970.84 × 3,216.36
  4. Step 4: Simplify right side
    11,980.56x = 57,800,690.94
  5. Step 5: Solve for x
    x = 57,800,690.94/11,980.56
  6. Step 6: Final answer
    x = 4,824.54

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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.