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Finding the Fourth Proportional to 13,627.44, 18,803.34 and 7,961.90

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Solution

The fourth proportional to 13,627.44, 18,803.34 and 7,961.90 is: 10,985.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,627.44 : 18,803.34 = 7,961.90 : x
  2. Step 2: Convert to fraction form
    13,627.44/18,803.34 = 7,961.90/x
  3. Step 3: Cross multiply
    13,627.44x = 18,803.34 × 7,961.90
  4. Step 4: Simplify right side
    13,627.44x = 149,710,218.73
  5. Step 5: Solve for x
    x = 149,710,218.73/13,627.44
  6. Step 6: Final answer
    x = 10,985.94

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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.