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Finding the Fourth Proportional to 18,967.88, 28,451.82 and 6,488.02

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Solution

The fourth proportional to 18,967.88, 28,451.82 and 6,488.02 is: 9,732.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,967.88 : 28,451.82 = 6,488.02 : x
  2. Step 2: Convert to fraction form
    18,967.88/28,451.82 = 6,488.02/x
  3. Step 3: Cross multiply
    18,967.88x = 28,451.82 × 6,488.02
  4. Step 4: Simplify right side
    18,967.88x = 184,595,977.20
  5. Step 5: Solve for x
    x = 184,595,977.20/18,967.88
  6. Step 6: Final answer
    x = 9,732.03

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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.