Home / 21,702.75-29,939.86-12,750.09

Finding the Fourth Proportional to 21,702.75, 29,939.86 and 12,750.09

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Solution

The fourth proportional to 21,702.75, 29,939.86 and 12,750.09 is: 17,589.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,702.75 : 29,939.86 = 12,750.09 : x
  2. Step 2: Convert to fraction form
    21,702.75/29,939.86 = 12,750.09/x
  3. Step 3: Cross multiply
    21,702.75x = 29,939.86 × 12,750.09
  4. Step 4: Simplify right side
    21,702.75x = 381,735,909.59
  5. Step 5: Solve for x
    x = 381,735,909.59/21,702.75
  6. Step 6: Final answer
    x = 17,589.29

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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.