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Finding the Fourth Proportional to 19,208.27, 28,815.48 and 8,115.06

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Solution

The fourth proportional to 19,208.27, 28,815.48 and 8,115.06 is: 12,173.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,208.27 : 28,815.48 = 8,115.06 : x
  2. Step 2: Convert to fraction form
    19,208.27/28,815.48 = 8,115.06/x
  3. Step 3: Cross multiply
    19,208.27x = 28,815.48 × 8,115.06
  4. Step 4: Simplify right side
    19,208.27x = 233,839,308.55
  5. Step 5: Solve for x
    x = 233,839,308.55/19,208.27
  6. Step 6: Final answer
    x = 12,173.89

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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.