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Finding the Fourth Proportional to 30,958.31, 42,722.09 and 16,811.25

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Solution

The fourth proportional to 30,958.31, 42,722.09 and 16,811.25 is: 23,199.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,958.31 : 42,722.09 = 16,811.25 : x
  2. Step 2: Convert to fraction form
    30,958.31/42,722.09 = 16,811.25/x
  3. Step 3: Cross multiply
    30,958.31x = 42,722.09 × 16,811.25
  4. Step 4: Simplify right side
    30,958.31x = 718,211,651.46
  5. Step 5: Solve for x
    x = 718,211,651.46/30,958.31
  6. Step 6: Final answer
    x = 23,199.32

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1.5x scale

Why These Related Problems?

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