Home / 21,275.34-31,917.75-6,485.41

Finding the Fourth Proportional to 21,275.34, 31,917.75 and 6,485.41

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Solution

The fourth proportional to 21,275.34, 31,917.75 and 6,485.41 is: 9,729.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,275.34 : 31,917.75 = 6,485.41 : x
  2. Step 2: Convert to fraction form
    21,275.34/31,917.75 = 6,485.41/x
  3. Step 3: Cross multiply
    21,275.34x = 31,917.75 × 6,485.41
  4. Step 4: Simplify right side
    21,275.34x = 206,999,615.23
  5. Step 5: Solve for x
    x = 206,999,615.23/21,275.34
  6. Step 6: Final answer
    x = 9,729.56

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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.