Home / 7,728.97-10,665.99-4,192.20

Finding the Fourth Proportional to 7,728.97, 10,665.99 and 4,192.20

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Solution

The fourth proportional to 7,728.97, 10,665.99 and 4,192.20 is: 5,785.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,728.97 : 10,665.99 = 4,192.20 : x
  2. Step 2: Convert to fraction form
    7,728.97/10,665.99 = 4,192.20/x
  3. Step 3: Cross multiply
    7,728.97x = 10,665.99 × 4,192.20
  4. Step 4: Simplify right side
    7,728.97x = 44,713,888.99
  5. Step 5: Solve for x
    x = 44,713,888.99/7,728.97
  6. Step 6: Final answer
    x = 5,785.23

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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.