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Finding the Fourth Proportional to 13,604.56, 18,774.37 and 7,943.24

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Solution

The fourth proportional to 13,604.56, 18,774.37 and 7,943.24 is: 10,961.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,604.56 : 18,774.37 = 7,943.24 : x
  2. Step 2: Convert to fraction form
    13,604.56/18,774.37 = 7,943.24/x
  3. Step 3: Cross multiply
    13,604.56x = 18,774.37 × 7,943.24
  4. Step 4: Simplify right side
    13,604.56x = 149,129,326.76
  5. Step 5: Solve for x
    x = 149,129,326.76/13,604.56
  6. Step 6: Final answer
    x = 10,961.72

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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.