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Finding the Fourth Proportional to 13,470.81, 20,211.08 and 6,900.09

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Solution

The fourth proportional to 13,470.81, 20,211.08 and 6,900.09 is: 10,352.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,470.81 : 20,211.08 = 6,900.09 : x
  2. Step 2: Convert to fraction form
    13,470.81/20,211.08 = 6,900.09/x
  3. Step 3: Cross multiply
    13,470.81x = 20,211.08 × 6,900.09
  4. Step 4: Simplify right side
    13,470.81x = 139,458,236.50
  5. Step 5: Solve for x
    x = 139,458,236.50/13,470.81
  6. Step 6: Final answer
    x = 10,352.62

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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.