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Finding the Fourth Proportional to 11,428.80, 17,144.96 and 4,855

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Solution

The fourth proportional to 11,428.80, 17,144.96 and 4,855 is: 7,283.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,428.80 : 17,144.96 = 4,855 : x
  2. Step 2: Convert to fraction form
    11,428.80/17,144.96 = 4,855/x
  3. Step 3: Cross multiply
    11,428.80x = 17,144.96 × 4,855
  4. Step 4: Simplify right side
    11,428.80x = 83,238,780.80
  5. Step 5: Solve for x
    x = 83,238,780.80/11,428.80
  6. Step 6: Final answer
    x = 7,283.25

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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.