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Finding the Fourth Proportional to 28,079, 38,702.82 and 19,905.32

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Solution

The fourth proportional to 28,079, 38,702.82 and 19,905.32 is: 27,436.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,079 : 38,702.82 = 19,905.32 : x
  2. Step 2: Convert to fraction form
    28,079/38,702.82 = 19,905.32/x
  3. Step 3: Cross multiply
    28,079x = 38,702.82 × 19,905.32
  4. Step 4: Simplify right side
    28,079x = 770,392,017.00
  5. Step 5: Solve for x
    x = 770,392,017.00/28,079
  6. Step 6: Final answer
    x = 27,436.59

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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.