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Finding the Fourth Proportional to 19,221.84, 28,822.73 and 7,372.08

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Solution

The fourth proportional to 19,221.84, 28,822.73 and 7,372.08 is: 11,054.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,221.84 : 28,822.73 = 7,372.08 : x
  2. Step 2: Convert to fraction form
    19,221.84/28,822.73 = 7,372.08/x
  3. Step 3: Cross multiply
    19,221.84x = 28,822.73 × 7,372.08
  4. Step 4: Simplify right side
    19,221.84x = 212,483,471.38
  5. Step 5: Solve for x
    x = 212,483,471.38/19,221.84
  6. Step 6: Final answer
    x = 11,054.27

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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.