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Finding the Fourth Proportional to 12,195.80, 16,830.59 and 6,890.96

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Solution

The fourth proportional to 12,195.80, 16,830.59 and 6,890.96 is: 9,509.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,195.80 : 16,830.59 = 6,890.96 : x
  2. Step 2: Convert to fraction form
    12,195.80/16,830.59 = 6,890.96/x
  3. Step 3: Cross multiply
    12,195.80x = 16,830.59 × 6,890.96
  4. Step 4: Simplify right side
    12,195.80x = 115,978,835.42
  5. Step 5: Solve for x
    x = 115,978,835.42/12,195.80
  6. Step 6: Final answer
    x = 9,509.74

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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.