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Finding the Fourth Proportional to 11,980.06, 17,973.66 and 8,655.82

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Solution

The fourth proportional to 11,980.06, 17,973.66 and 8,655.82 is: 12,986.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,980.06 : 17,973.66 = 8,655.82 : x
  2. Step 2: Convert to fraction form
    11,980.06/17,973.66 = 8,655.82/x
  3. Step 3: Cross multiply
    11,980.06x = 17,973.66 × 8,655.82
  4. Step 4: Simplify right side
    11,980.06x = 155,576,765.70
  5. Step 5: Solve for x
    x = 155,576,765.70/11,980.06
  6. Step 6: Final answer
    x = 12,986.31

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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.