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Finding the Fourth Proportional to 20,750.25, 31,125.92 and 6,899.25

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Solution

The fourth proportional to 20,750.25, 31,125.92 and 6,899.25 is: 10,349.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.25 : 31,125.92 = 6,899.25 : x
  2. Step 2: Convert to fraction form
    20,750.25/31,125.92 = 6,899.25/x
  3. Step 3: Cross multiply
    20,750.25x = 31,125.92 × 6,899.25
  4. Step 4: Simplify right side
    20,750.25x = 214,745,469.06
  5. Step 5: Solve for x
    x = 214,745,469.06/20,750.25
  6. Step 6: Final answer
    x = 10,349.05

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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.