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Finding the Fourth Proportional to 20,525.64, 30,912.90 and 18,214.44

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Solution

The fourth proportional to 20,525.64, 30,912.90 and 18,214.44 is: 27,432.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,525.64 : 30,912.90 = 18,214.44 : x
  2. Step 2: Convert to fraction form
    20,525.64/30,912.90 = 18,214.44/x
  3. Step 3: Cross multiply
    20,525.64x = 30,912.90 × 18,214.44
  4. Step 4: Simplify right side
    20,525.64x = 563,061,162.28
  5. Step 5: Solve for x
    x = 563,061,162.28/20,525.64
  6. Step 6: Final answer
    x = 27,432.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.