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Finding the Fourth Proportional to 19,003.21, 28,489.32 and 7,918.16

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Solution

The fourth proportional to 19,003.21, 28,489.32 and 7,918.16 is: 11,870.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,003.21 : 28,489.32 = 7,918.16 : x
  2. Step 2: Convert to fraction form
    19,003.21/28,489.32 = 7,918.16/x
  3. Step 3: Cross multiply
    19,003.21x = 28,489.32 × 7,918.16
  4. Step 4: Simplify right side
    19,003.21x = 225,582,851.60
  5. Step 5: Solve for x
    x = 225,582,851.60/19,003.21
  6. Step 6: Final answer
    x = 11,870.78

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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.