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Finding the Fourth Proportional to 15,794.61, 21,796.73 and 8,721.02

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Solution

The fourth proportional to 15,794.61, 21,796.73 and 8,721.02 is: 12,035.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,794.61 : 21,796.73 = 8,721.02 : x
  2. Step 2: Convert to fraction form
    15,794.61/21,796.73 = 8,721.02/x
  3. Step 3: Cross multiply
    15,794.61x = 21,796.73 × 8,721.02
  4. Step 4: Simplify right side
    15,794.61x = 190,089,565.68
  5. Step 5: Solve for x
    x = 190,089,565.68/15,794.61
  6. Step 6: Final answer
    x = 12,035.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.