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Finding the Fourth Proportional to 13,460.90, 20,195.49 and 6,891.70

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Solution

The fourth proportional to 13,460.90, 20,195.49 and 6,891.70 is: 10,339.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,460.90 : 20,195.49 = 6,891.70 : x
  2. Step 2: Convert to fraction form
    13,460.90/20,195.49 = 6,891.70/x
  3. Step 3: Cross multiply
    13,460.90x = 20,195.49 × 6,891.70
  4. Step 4: Simplify right side
    13,460.90x = 139,181,258.43
  5. Step 5: Solve for x
    x = 139,181,258.43/13,460.90
  6. Step 6: Final answer
    x = 10,339.67

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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.