Home / 30,968.57-42,736.85-16,821.42

Finding the Fourth Proportional to 30,968.57, 42,736.85 and 16,821.42

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Solution

The fourth proportional to 30,968.57, 42,736.85 and 16,821.42 is: 23,213.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.57 : 42,736.85 = 16,821.42 : x
  2. Step 2: Convert to fraction form
    30,968.57/42,736.85 = 16,821.42/x
  3. Step 3: Cross multiply
    30,968.57x = 42,736.85 × 16,821.42
  4. Step 4: Simplify right side
    30,968.57x = 718,894,419.22
  5. Step 5: Solve for x
    x = 718,894,419.22/30,968.57
  6. Step 6: Final answer
    x = 23,213.68

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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.