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Finding the Fourth Proportional to 30,867.34, 42,597.26 and 16,720.49

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Solution

The fourth proportional to 30,867.34, 42,597.26 and 16,720.49 is: 23,074.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,867.34 : 42,597.26 = 16,720.49 : x
  2. Step 2: Convert to fraction form
    30,867.34/42,597.26 = 16,720.49/x
  3. Step 3: Cross multiply
    30,867.34x = 42,597.26 × 16,720.49
  4. Step 4: Simplify right side
    30,867.34x = 712,247,059.86
  5. Step 5: Solve for x
    x = 712,247,059.86/30,867.34
  6. Step 6: Final answer
    x = 23,074.46

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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.