Home / 7,921.74-11,882.79-2,990.19

Finding the Fourth Proportional to 7,921.74, 11,882.79 and 2,990.19

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Solution

The fourth proportional to 7,921.74, 11,882.79 and 2,990.19 is: 4,485.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.74 : 11,882.79 = 2,990.19 : x
  2. Step 2: Convert to fraction form
    7,921.74/11,882.79 = 2,990.19/x
  3. Step 3: Cross multiply
    7,921.74x = 11,882.79 × 2,990.19
  4. Step 4: Simplify right side
    7,921.74x = 35,531,799.83
  5. Step 5: Solve for x
    x = 35,531,799.83/7,921.74
  6. Step 6: Final answer
    x = 4,485.35

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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.