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Finding the Fourth Proportional to 13,266.42, 19,893.25 and 7,721.01

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Solution

The fourth proportional to 13,266.42, 19,893.25 and 7,721.01 is: 11,577.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,266.42 : 19,893.25 = 7,721.01 : x
  2. Step 2: Convert to fraction form
    13,266.42/19,893.25 = 7,721.01/x
  3. Step 3: Cross multiply
    13,266.42x = 19,893.25 × 7,721.01
  4. Step 4: Simplify right side
    13,266.42x = 153,595,982.18
  5. Step 5: Solve for x
    x = 153,595,982.18/13,266.42
  6. Step 6: Final answer
    x = 11,577.80

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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.