Home / 30,968.86-42,735.42-16,821.66

Finding the Fourth Proportional to 30,968.86, 42,735.42 and 16,821.66

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Solution

The fourth proportional to 30,968.86, 42,735.42 and 16,821.66 is: 23,213.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.86 : 42,735.42 = 16,821.66 : x
  2. Step 2: Convert to fraction form
    30,968.86/42,735.42 = 16,821.66/x
  3. Step 3: Cross multiply
    30,968.86x = 42,735.42 × 16,821.66
  4. Step 4: Simplify right side
    30,968.86x = 718,880,705.20
  5. Step 5: Solve for x
    x = 718,880,705.20/30,968.86
  6. Step 6: Final answer
    x = 23,213.02

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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.