Home / 21,147.06-31,713.30-7,104.90

Finding the Fourth Proportional to 21,147.06, 31,713.30 and 7,104.90

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Solution

The fourth proportional to 21,147.06, 31,713.30 and 7,104.90 is: 10,654.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.06 : 31,713.30 = 7,104.90 : x
  2. Step 2: Convert to fraction form
    21,147.06/31,713.30 = 7,104.90/x
  3. Step 3: Cross multiply
    21,147.06x = 31,713.30 × 7,104.90
  4. Step 4: Simplify right side
    21,147.06x = 225,319,825.17
  5. Step 5: Solve for x
    x = 225,319,825.17/21,147.06
  6. Step 6: Final answer
    x = 10,654.90

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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.