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Finding the Fourth Proportional to 11,181.94, 15,420.48 and 7,346.84

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Solution

The fourth proportional to 11,181.94, 15,420.48 and 7,346.84 is: 10,131.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,181.94 : 15,420.48 = 7,346.84 : x
  2. Step 2: Convert to fraction form
    11,181.94/15,420.48 = 7,346.84/x
  3. Step 3: Cross multiply
    11,181.94x = 15,420.48 × 7,346.84
  4. Step 4: Simplify right side
    11,181.94x = 113,291,694.63
  5. Step 5: Solve for x
    x = 113,291,694.63/11,181.94
  6. Step 6: Final answer
    x = 10,131.67

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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.