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Finding the Fourth Proportional to 19,815, 29,722.50 and 7,503

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Solution

The fourth proportional to 19,815, 29,722.50 and 7,503 is: 11,254.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,815 : 29,722.50 = 7,503 : x
  2. Step 2: Convert to fraction form
    19,815/29,722.50 = 7,503/x
  3. Step 3: Cross multiply
    19,815x = 29,722.50 × 7,503
  4. Step 4: Simplify right side
    19,815x = 223,007,917.50
  5. Step 5: Solve for x
    x = 223,007,917.50/19,815
  6. Step 6: Final answer
    x = 11,254.50

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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.