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Finding the Fourth Proportional to 7,188.48, 9,917.79 and 4,354.95

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Solution

The fourth proportional to 7,188.48, 9,917.79 and 4,354.95 is: 6,008.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,188.48 : 9,917.79 = 4,354.95 : x
  2. Step 2: Convert to fraction form
    7,188.48/9,917.79 = 4,354.95/x
  3. Step 3: Cross multiply
    7,188.48x = 9,917.79 × 4,354.95
  4. Step 4: Simplify right side
    7,188.48x = 43,191,479.56
  5. Step 5: Solve for x
    x = 43,191,479.56/7,188.48
  6. Step 6: Final answer
    x = 6,008.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.