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Finding the Fourth Proportional to 19,260, 28,860.66 and 13,725

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Solution

The fourth proportional to 19,260, 28,860.66 and 13,725 is: 20,566.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,260 : 28,860.66 = 13,725 : x
  2. Step 2: Convert to fraction form
    19,260/28,860.66 = 13,725/x
  3. Step 3: Cross multiply
    19,260x = 28,860.66 × 13,725
  4. Step 4: Simplify right side
    19,260x = 396,112,558.50
  5. Step 5: Solve for x
    x = 396,112,558.50/19,260
  6. Step 6: Final answer
    x = 20,566.59

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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.