Home / 30,968.60-42,735.06-16,821.42

Finding the Fourth Proportional to 30,968.60, 42,735.06 and 16,821.42

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Solution

The fourth proportional to 30,968.60, 42,735.06 and 16,821.42 is: 23,212.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,968.60 : 42,735.06 = 16,821.42 : x
  2. Step 2: Convert to fraction form
    30,968.60/42,735.06 = 16,821.42/x
  3. Step 3: Cross multiply
    30,968.60x = 42,735.06 × 16,821.42
  4. Step 4: Simplify right side
    30,968.60x = 718,864,392.99
  5. Step 5: Solve for x
    x = 718,864,392.99/30,968.60
  6. Step 6: Final answer
    x = 23,212.69

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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.