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Finding the Fourth Proportional to 15,797.99, 21,801.26 and 8,724.44

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Solution

The fourth proportional to 15,797.99, 21,801.26 and 8,724.44 is: 12,039.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,797.99 : 21,801.26 = 8,724.44 : x
  2. Step 2: Convert to fraction form
    15,797.99/21,801.26 = 8,724.44/x
  3. Step 3: Cross multiply
    15,797.99x = 21,801.26 × 8,724.44
  4. Step 4: Simplify right side
    15,797.99x = 190,203,784.79
  5. Step 5: Solve for x
    x = 190,203,784.79/15,797.99
  6. Step 6: Final answer
    x = 12,039.75

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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.