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Finding the Fourth Proportional to 39,479.72, 59,231.46 and 14,531.72

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Solution

The fourth proportional to 39,479.72, 59,231.46 and 14,531.72 is: 21,801.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,479.72 : 59,231.46 = 14,531.72 : x
  2. Step 2: Convert to fraction form
    39,479.72/59,231.46 = 14,531.72/x
  3. Step 3: Cross multiply
    39,479.72x = 59,231.46 × 14,531.72
  4. Step 4: Simplify right side
    39,479.72x = 860,734,991.91
  5. Step 5: Solve for x
    x = 860,734,991.91/39,479.72
  6. Step 6: Final answer
    x = 21,801.95

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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.