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Finding the Fourth Proportional to 21,798.75, 32,702.99 and 7,947.75

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Solution

The fourth proportional to 21,798.75, 32,702.99 and 7,947.75 is: 11,923.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,798.75 : 32,702.99 = 7,947.75 : x
  2. Step 2: Convert to fraction form
    21,798.75/32,702.99 = 7,947.75/x
  3. Step 3: Cross multiply
    21,798.75x = 32,702.99 × 7,947.75
  4. Step 4: Simplify right side
    21,798.75x = 259,915,149.03
  5. Step 5: Solve for x
    x = 259,915,149.03/21,798.75
  6. Step 6: Final answer
    x = 11,923.40

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1.5x scale

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.