Home / 20,653.44-30,979.80-5,071.20

Finding the Fourth Proportional to 20,653.44, 30,979.80 and 5,071.20

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Solution

The fourth proportional to 20,653.44, 30,979.80 and 5,071.20 is: 7,606.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.44 : 30,979.80 = 5,071.20 : x
  2. Step 2: Convert to fraction form
    20,653.44/30,979.80 = 5,071.20/x
  3. Step 3: Cross multiply
    20,653.44x = 30,979.80 × 5,071.20
  4. Step 4: Simplify right side
    20,653.44x = 157,104,761.76
  5. Step 5: Solve for x
    x = 157,104,761.76/20,653.44
  6. Step 6: Final answer
    x = 7,606.71

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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.