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Finding the Fourth Proportional to 13,479.63, 20,206.98 and 6,891.30

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Solution

The fourth proportional to 13,479.63, 20,206.98 and 6,891.30 is: 10,330.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.63 : 20,206.98 = 6,891.30 : x
  2. Step 2: Convert to fraction form
    13,479.63/20,206.98 = 6,891.30/x
  3. Step 3: Cross multiply
    13,479.63x = 20,206.98 × 6,891.30
  4. Step 4: Simplify right side
    13,479.63x = 139,252,361.27
  5. Step 5: Solve for x
    x = 139,252,361.27/13,479.63
  6. Step 6: Final answer
    x = 10,330.58

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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.