Home / 21,842.62-30,142.92-12,768.51

Finding the Fourth Proportional to 21,842.62, 30,142.92 and 12,768.51

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Solution

The fourth proportional to 21,842.62, 30,142.92 and 12,768.51 is: 17,620.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,842.62 : 30,142.92 = 12,768.51 : x
  2. Step 2: Convert to fraction form
    21,842.62/30,142.92 = 12,768.51/x
  3. Step 3: Cross multiply
    21,842.62x = 30,142.92 × 12,768.51
  4. Step 4: Simplify right side
    21,842.62x = 384,880,175.45
  5. Step 5: Solve for x
    x = 384,880,175.45/21,842.62
  6. Step 6: Final answer
    x = 17,620.60

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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.