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Finding the Fourth Proportional to 7,998.85, 12,004.40 and 6,442.64

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Solution

The fourth proportional to 7,998.85, 12,004.40 and 6,442.64 is: 9,668.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,998.85 : 12,004.40 = 6,442.64 : x
  2. Step 2: Convert to fraction form
    7,998.85/12,004.40 = 6,442.64/x
  3. Step 3: Cross multiply
    7,998.85x = 12,004.40 × 6,442.64
  4. Step 4: Simplify right side
    7,998.85x = 77,340,028.72
  5. Step 5: Solve for x
    x = 77,340,028.72/7,998.85
  6. Step 6: Final answer
    x = 9,668.89

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1.5x scale

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.