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Finding the Fourth Proportional to 12,172.88, 16,798.08 and 6,868.80

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Solution

The fourth proportional to 12,172.88, 16,798.08 and 6,868.80 is: 9,478.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,172.88 : 16,798.08 = 6,868.80 : x
  2. Step 2: Convert to fraction form
    12,172.88/16,798.08 = 6,868.80/x
  3. Step 3: Cross multiply
    12,172.88x = 16,798.08 × 6,868.80
  4. Step 4: Simplify right side
    12,172.88x = 115,382,651.90
  5. Step 5: Solve for x
    x = 115,382,651.90/12,172.88
  6. Step 6: Final answer
    x = 9,478.67

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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.