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Finding the Fourth Proportional to 12,089.60, 18,148.80 and 6,828.80

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Solution

The fourth proportional to 12,089.60, 18,148.80 and 6,828.80 is: 10,251.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,089.60 : 18,148.80 = 6,828.80 : x
  2. Step 2: Convert to fraction form
    12,089.60/18,148.80 = 6,828.80/x
  3. Step 3: Cross multiply
    12,089.60x = 18,148.80 × 6,828.80
  4. Step 4: Simplify right side
    12,089.60x = 123,934,525.44
  5. Step 5: Solve for x
    x = 123,934,525.44/12,089.60
  6. Step 6: Final answer
    x = 10,251.33

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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.