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Finding the Fourth Proportional to 19,819, 29,728.50 and 7,507

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Solution

The fourth proportional to 19,819, 29,728.50 and 7,507 is: 11,260.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,819 : 29,728.50 = 7,507 : x
  2. Step 2: Convert to fraction form
    19,819/29,728.50 = 7,507/x
  3. Step 3: Cross multiply
    19,819x = 29,728.50 × 7,507
  4. Step 4: Simplify right side
    19,819x = 223,171,849.50
  5. Step 5: Solve for x
    x = 223,171,849.50/19,819
  6. Step 6: Final answer
    x = 11,260.50

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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.