Home / 30,968.90-42,736.38-16,821.44

Finding the Fourth Proportional to 30,968.90, 42,736.38 and 16,821.44

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Solution

The fourth proportional to 30,968.90, 42,736.38 and 16,821.44 is: 23,213.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.90 : 42,736.38 = 16,821.44 : x
  2. Step 2: Convert to fraction form
    30,968.90/42,736.38 = 16,821.44/x
  3. Step 3: Cross multiply
    30,968.90x = 42,736.38 × 16,821.44
  4. Step 4: Simplify right side
    30,968.90x = 718,887,451.99
  5. Step 5: Solve for x
    x = 718,887,451.99/30,968.90
  6. Step 6: Final answer
    x = 23,213.21

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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.