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Finding the Fourth Proportional to 12,139.44, 18,197.80 and 5,559

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Solution

The fourth proportional to 12,139.44, 18,197.80 and 5,559 is: 8,333.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139.44 : 18,197.80 = 5,559 : x
  2. Step 2: Convert to fraction form
    12,139.44/18,197.80 = 5,559/x
  3. Step 3: Cross multiply
    12,139.44x = 18,197.80 × 5,559
  4. Step 4: Simplify right side
    12,139.44x = 101,161,570.20
  5. Step 5: Solve for x
    x = 101,161,570.20/12,139.44
  6. Step 6: Final answer
    x = 8,333.30

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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.