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Finding the Fourth Proportional to 15,825.44, 21,839.64 and 8,751.44

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Solution

The fourth proportional to 15,825.44, 21,839.64 and 8,751.44 is: 12,077.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,825.44 : 21,839.64 = 8,751.44 : x
  2. Step 2: Convert to fraction form
    15,825.44/21,839.64 = 8,751.44/x
  3. Step 3: Cross multiply
    15,825.44x = 21,839.64 × 8,751.44
  4. Step 4: Simplify right side
    15,825.44x = 191,128,299.08
  5. Step 5: Solve for x
    x = 191,128,299.08/15,825.44
  6. Step 6: Final answer
    x = 12,077.28

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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.