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Finding the Fourth Proportional to 30,876.18, 42,609.08 and 16,729.08

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Solution

The fourth proportional to 30,876.18, 42,609.08 and 16,729.08 is: 23,086.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,876.18 : 42,609.08 = 16,729.08 : x
  2. Step 2: Convert to fraction form
    30,876.18/42,609.08 = 16,729.08/x
  3. Step 3: Cross multiply
    30,876.18x = 42,609.08 × 16,729.08
  4. Step 4: Simplify right side
    30,876.18x = 712,810,708.05
  5. Step 5: Solve for x
    x = 712,810,708.05/30,876.18
  6. Step 6: Final answer
    x = 23,086.10

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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.