Home / 21,071.63-31,609.26-5,489.25

Finding the Fourth Proportional to 21,071.63, 31,609.26 and 5,489.25

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Solution

The fourth proportional to 21,071.63, 31,609.26 and 5,489.25 is: 8,234.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.63 : 31,609.26 = 5,489.25 : x
  2. Step 2: Convert to fraction form
    21,071.63/31,609.26 = 5,489.25/x
  3. Step 3: Cross multiply
    21,071.63x = 31,609.26 × 5,489.25
  4. Step 4: Simplify right side
    21,071.63x = 173,511,130.46
  5. Step 5: Solve for x
    x = 173,511,130.46/21,071.63
  6. Step 6: Final answer
    x = 8,234.35

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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.