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Finding the Fourth Proportional to 11,880.14, 17,820.14 and 3,115.13

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Solution

The fourth proportional to 11,880.14, 17,820.14 and 3,115.13 is: 4,672.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,880.14 : 17,820.14 = 3,115.13 : x
  2. Step 2: Convert to fraction form
    11,880.14/17,820.14 = 3,115.13/x
  3. Step 3: Cross multiply
    11,880.14x = 17,820.14 × 3,115.13
  4. Step 4: Simplify right side
    11,880.14x = 55,511,948.04
  5. Step 5: Solve for x
    x = 55,511,948.04/11,880.14
  6. Step 6: Final answer
    x = 4,672.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.