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Finding the Fourth Proportional to 19,004.85, 28,499.07 and 7,309.89

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Solution

The fourth proportional to 19,004.85, 28,499.07 and 7,309.89 is: 10,961.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,004.85 : 28,499.07 = 7,309.89 : x
  2. Step 2: Convert to fraction form
    19,004.85/28,499.07 = 7,309.89/x
  3. Step 3: Cross multiply
    19,004.85x = 28,499.07 × 7,309.89
  4. Step 4: Simplify right side
    19,004.85x = 208,325,066.80
  5. Step 5: Solve for x
    x = 208,325,066.80/19,004.85
  6. Step 6: Final answer
    x = 10,961.68

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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.