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Finding the Fourth Proportional to 13,245.78, 18,273.96 and 7,941.12

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Solution

The fourth proportional to 13,245.78, 18,273.96 and 7,941.12 is: 10,955.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.78 : 18,273.96 = 7,941.12 : x
  2. Step 2: Convert to fraction form
    13,245.78/18,273.96 = 7,941.12/x
  3. Step 3: Cross multiply
    13,245.78x = 18,273.96 × 7,941.12
  4. Step 4: Simplify right side
    13,245.78x = 145,115,709.24
  5. Step 5: Solve for x
    x = 145,115,709.24/13,245.78
  6. Step 6: Final answer
    x = 10,955.62

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Double scale
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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.