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Finding the Fourth Proportional to 13,755.75, 20,633.90 and 4,521.75

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Solution

The fourth proportional to 13,755.75, 20,633.90 and 4,521.75 is: 6,782.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.75 : 20,633.90 = 4,521.75 : x
  2. Step 2: Convert to fraction form
    13,755.75/20,633.90 = 4,521.75/x
  3. Step 3: Cross multiply
    13,755.75x = 20,633.90 × 4,521.75
  4. Step 4: Simplify right side
    13,755.75x = 93,301,337.33
  5. Step 5: Solve for x
    x = 93,301,337.33/13,755.75
  6. Step 6: Final answer
    x = 6,782.72

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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.