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Finding the Fourth Proportional to 28,978.80, 43,367.40 and 17,300.40

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Solution

The fourth proportional to 28,978.80, 43,367.40 and 17,300.40 is: 25,890.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.80 : 43,367.40 = 17,300.40 : x
  2. Step 2: Convert to fraction form
    28,978.80/43,367.40 = 17,300.40/x
  3. Step 3: Cross multiply
    28,978.80x = 43,367.40 × 17,300.40
  4. Step 4: Simplify right side
    28,978.80x = 750,273,366.96
  5. Step 5: Solve for x
    x = 750,273,366.96/28,978.80
  6. Step 6: Final answer
    x = 25,890.42

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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.