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Finding the Fourth Proportional to 30,951.12, 42,712.48 and 16,803.96

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Solution

The fourth proportional to 30,951.12, 42,712.48 and 16,803.96 is: 23,189.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,951.12 : 42,712.48 = 16,803.96 : x
  2. Step 2: Convert to fraction form
    30,951.12/42,712.48 = 16,803.96/x
  3. Step 3: Cross multiply
    30,951.12x = 42,712.48 × 16,803.96
  4. Step 4: Simplify right side
    30,951.12x = 717,738,805.42
  5. Step 5: Solve for x
    x = 717,738,805.42/30,951.12
  6. Step 6: Final answer
    x = 23,189.43

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.