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Finding the Fourth Proportional to 15,794.66, 21,796.77 and 8,721.62

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Solution

The fourth proportional to 15,794.66, 21,796.77 and 8,721.62 is: 12,035.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,794.66 : 21,796.77 = 8,721.62 : x
  2. Step 2: Convert to fraction form
    15,794.66/21,796.77 = 8,721.62/x
  3. Step 3: Cross multiply
    15,794.66x = 21,796.77 × 8,721.62
  4. Step 4: Simplify right side
    15,794.66x = 190,103,145.17
  5. Step 5: Solve for x
    x = 190,103,145.17/15,794.66
  6. Step 6: Final answer
    x = 12,035.91

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1.5x scale

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.