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Finding the Fourth Proportional to 19,728, 29,596.32 and 7,416

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Solution

The fourth proportional to 19,728, 29,596.32 and 7,416 is: 11,125.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,728 : 29,596.32 = 7,416 : x
  2. Step 2: Convert to fraction form
    19,728/29,596.32 = 7,416/x
  3. Step 3: Cross multiply
    19,728x = 29,596.32 × 7,416
  4. Step 4: Simplify right side
    19,728x = 219,486,309.12
  5. Step 5: Solve for x
    x = 219,486,309.12/19,728
  6. Step 6: Final answer
    x = 11,125.62

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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.