Home / 7,981.47-11,968.56-2,786.13

Finding the Fourth Proportional to 7,981.47, 11,968.56 and 2,786.13

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Solution

The fourth proportional to 7,981.47, 11,968.56 and 2,786.13 is: 4,177.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,981.47 : 11,968.56 = 2,786.13 : x
  2. Step 2: Convert to fraction form
    7,981.47/11,968.56 = 2,786.13/x
  3. Step 3: Cross multiply
    7,981.47x = 11,968.56 × 2,786.13
  4. Step 4: Simplify right side
    7,981.47x = 33,345,964.07
  5. Step 5: Solve for x
    x = 33,345,964.07/7,981.47
  6. Step 6: Final answer
    x = 4,177.92

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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.