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Finding the Fourth Proportional to 12,720.44, 19,084.08 and 5,321

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Solution

The fourth proportional to 12,720.44, 19,084.08 and 5,321 is: 7,982.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.44 : 19,084.08 = 5,321 : x
  2. Step 2: Convert to fraction form
    12,720.44/19,084.08 = 5,321/x
  3. Step 3: Cross multiply
    12,720.44x = 19,084.08 × 5,321
  4. Step 4: Simplify right side
    12,720.44x = 101,546,389.68
  5. Step 5: Solve for x
    x = 101,546,389.68/12,720.44
  6. Step 6: Final answer
    x = 7,982.93

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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.