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Finding the Fourth Proportional to 19,881.31, 29,821.92 and 5,090.23

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Solution

The fourth proportional to 19,881.31, 29,821.92 and 5,090.23 is: 7,635.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.31 : 29,821.92 = 5,090.23 : x
  2. Step 2: Convert to fraction form
    19,881.31/29,821.92 = 5,090.23/x
  3. Step 3: Cross multiply
    19,881.31x = 29,821.92 × 5,090.23
  4. Step 4: Simplify right side
    19,881.31x = 151,800,431.84
  5. Step 5: Solve for x
    x = 151,800,431.84/19,881.31
  6. Step 6: Final answer
    x = 7,635.33

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1.5x scale

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.