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Finding the Fourth Proportional to 12,539.98, 18,810 and 3,180

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Solution

The fourth proportional to 12,539.98, 18,810 and 3,180 is: 4,770.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,539.98 : 18,810 = 3,180 : x
  2. Step 2: Convert to fraction form
    12,539.98/18,810 = 3,180/x
  3. Step 3: Cross multiply
    12,539.98x = 18,810 × 3,180
  4. Step 4: Simplify right side
    12,539.98x = 59,815,800
  5. Step 5: Solve for x
    x = 59,815,800/12,539.98
  6. Step 6: Final answer
    x = 4,770.01

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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.