Home / 13,839.80-20,762.88-3,979.16

Finding the Fourth Proportional to 13,839.80, 20,762.88 and 3,979.16

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Solution

The fourth proportional to 13,839.80, 20,762.88 and 3,979.16 is: 5,969.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,839.80 : 20,762.88 = 3,979.16 : x
  2. Step 2: Convert to fraction form
    13,839.80/20,762.88 = 3,979.16/x
  3. Step 3: Cross multiply
    13,839.80x = 20,762.88 × 3,979.16
  4. Step 4: Simplify right side
    13,839.80x = 82,618,821.58
  5. Step 5: Solve for x
    x = 82,618,821.58/13,839.80
  6. Step 6: Final answer
    x = 5,969.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.