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Finding the Fourth Proportional to 19,362, 28,987.92 and 12,768.08

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Solution

The fourth proportional to 19,362, 28,987.92 and 12,768.08 is: 19,115.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,362 : 28,987.92 = 12,768.08 : x
  2. Step 2: Convert to fraction form
    19,362/28,987.92 = 12,768.08/x
  3. Step 3: Cross multiply
    19,362x = 28,987.92 × 12,768.08
  4. Step 4: Simplify right side
    19,362x = 370,120,081.59
  5. Step 5: Solve for x
    x = 370,120,081.59/19,362
  6. Step 6: Final answer
    x = 19,115.80

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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.