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Finding the Fourth Proportional to 12,818.80, 19,236.80 and 4,498.80

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Solution

The fourth proportional to 12,818.80, 19,236.80 and 4,498.80 is: 6,751.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,818.80 : 19,236.80 = 4,498.80 : x
  2. Step 2: Convert to fraction form
    12,818.80/19,236.80 = 4,498.80/x
  3. Step 3: Cross multiply
    12,818.80x = 19,236.80 × 4,498.80
  4. Step 4: Simplify right side
    12,818.80x = 86,542,515.84
  5. Step 5: Solve for x
    x = 86,542,515.84/12,818.80
  6. Step 6: Final answer
    x = 6,751.22

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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.