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Finding the Fourth Proportional to 12,818.80, 19,228.80 and 4,054.42

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Solution

The fourth proportional to 12,818.80, 19,228.80 and 4,054.42 is: 6,081.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,818.80 : 19,228.80 = 4,054.42 : x
  2. Step 2: Convert to fraction form
    12,818.80/19,228.80 = 4,054.42/x
  3. Step 3: Cross multiply
    12,818.80x = 19,228.80 × 4,054.42
  4. Step 4: Simplify right side
    12,818.80x = 77,961,631.30
  5. Step 5: Solve for x
    x = 77,961,631.30/12,818.80
  6. Step 6: Final answer
    x = 6,081.82

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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.