Home / 30,969.28-42,736.90-16,821.82

Finding the Fourth Proportional to 30,969.28, 42,736.90 and 16,821.82

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Solution

The fourth proportional to 30,969.28, 42,736.90 and 16,821.82 is: 23,213.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,969.28 : 42,736.90 = 16,821.82 : x
  2. Step 2: Convert to fraction form
    30,969.28/42,736.90 = 16,821.82/x
  3. Step 3: Cross multiply
    30,969.28x = 42,736.90 × 16,821.82
  4. Step 4: Simplify right side
    30,969.28x = 718,912,439.16
  5. Step 5: Solve for x
    x = 718,912,439.16/30,969.28
  6. Step 6: Final answer
    x = 23,213.73

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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.