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Finding the Fourth Proportional to 30,867.67, 42,597.34 and 16,720.57

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Solution

The fourth proportional to 30,867.67, 42,597.34 and 16,720.57 is: 23,074.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,867.67 : 42,597.34 = 16,720.57 : x
  2. Step 2: Convert to fraction form
    30,867.67/42,597.34 = 16,720.57/x
  3. Step 3: Cross multiply
    30,867.67x = 42,597.34 × 16,720.57
  4. Step 4: Simplify right side
    30,867.67x = 712,251,805.28
  5. Step 5: Solve for x
    x = 712,251,805.28/30,867.67
  6. Step 6: Final answer
    x = 23,074.36

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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.