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Finding the Fourth Proportional to 28,702.80, 43,054.20 and 19,954.80

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Solution

The fourth proportional to 28,702.80, 43,054.20 and 19,954.80 is: 29,932.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,702.80 : 43,054.20 = 19,954.80 : x
  2. Step 2: Convert to fraction form
    28,702.80/43,054.20 = 19,954.80/x
  3. Step 3: Cross multiply
    28,702.80x = 43,054.20 × 19,954.80
  4. Step 4: Simplify right side
    28,702.80x = 859,137,950.16
  5. Step 5: Solve for x
    x = 859,137,950.16/28,702.80
  6. Step 6: Final answer
    x = 29,932.20

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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.