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Finding the Fourth Proportional to 31,003.08, 42,786 and 16,855.62

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Solution

The fourth proportional to 31,003.08, 42,786 and 16,855.62 is: 23,261.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,003.08 : 42,786 = 16,855.62 : x
  2. Step 2: Convert to fraction form
    31,003.08/42,786 = 16,855.62/x
  3. Step 3: Cross multiply
    31,003.08x = 42,786 × 16,855.62
  4. Step 4: Simplify right side
    31,003.08x = 721,184,557.32
  5. Step 5: Solve for x
    x = 721,184,557.32/31,003.08
  6. Step 6: Final answer
    x = 23,261.71

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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.