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Finding the Fourth Proportional to 20,903.84, 31,311.84 and 16,968.32

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Solution

The fourth proportional to 20,903.84, 31,311.84 and 16,968.32 is: 25,416.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,903.84 : 31,311.84 = 16,968.32 : x
  2. Step 2: Convert to fraction form
    20,903.84/31,311.84 = 16,968.32/x
  3. Step 3: Cross multiply
    20,903.84x = 31,311.84 × 16,968.32
  4. Step 4: Simplify right side
    20,903.84x = 531,309,320.91
  5. Step 5: Solve for x
    x = 531,309,320.91/20,903.84
  6. Step 6: Final answer
    x = 25,416.83

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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.