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Finding the Fourth Proportional to 21,201.90, 31,801.83 and 8,053.25

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Solution

The fourth proportional to 21,201.90, 31,801.83 and 8,053.25 is: 12,079.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,201.90 : 31,801.83 = 8,053.25 : x
  2. Step 2: Convert to fraction form
    21,201.90/31,801.83 = 8,053.25/x
  3. Step 3: Cross multiply
    21,201.90x = 31,801.83 × 8,053.25
  4. Step 4: Simplify right side
    21,201.90x = 256,107,928.44
  5. Step 5: Solve for x
    x = 256,107,928.44/21,201.90
  6. Step 6: Final answer
    x = 12,079.48

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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.