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Finding the Fourth Proportional to 28,907.29, 39,897.14 and 16,811.52

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Solution

The fourth proportional to 28,907.29, 39,897.14 and 16,811.52 is: 23,202.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,907.29 : 39,897.14 = 16,811.52 : x
  2. Step 2: Convert to fraction form
    28,907.29/39,897.14 = 16,811.52/x
  3. Step 3: Cross multiply
    28,907.29x = 39,897.14 × 16,811.52
  4. Step 4: Simplify right side
    28,907.29x = 670,731,567.05
  5. Step 5: Solve for x
    x = 670,731,567.05/28,907.29
  6. Step 6: Final answer
    x = 23,202.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.