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Finding the Fourth Proportional to 19,120.80, 28,679.04 and 5,268

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Solution

The fourth proportional to 19,120.80, 28,679.04 and 5,268 is: 7,901.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,120.80 : 28,679.04 = 5,268 : x
  2. Step 2: Convert to fraction form
    19,120.80/28,679.04 = 5,268/x
  3. Step 3: Cross multiply
    19,120.80x = 28,679.04 × 5,268
  4. Step 4: Simplify right side
    19,120.80x = 151,081,182.72
  5. Step 5: Solve for x
    x = 151,081,182.72/19,120.80
  6. Step 6: Final answer
    x = 7,901.40

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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.