Home / 21,194.91-31,804.56-7,877.25

Finding the Fourth Proportional to 21,194.91, 31,804.56 and 7,877.25

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Solution

The fourth proportional to 21,194.91, 31,804.56 and 7,877.25 is: 11,820.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,194.91 : 31,804.56 = 7,877.25 : x
  2. Step 2: Convert to fraction form
    21,194.91/31,804.56 = 7,877.25/x
  3. Step 3: Cross multiply
    21,194.91x = 31,804.56 × 7,877.25
  4. Step 4: Simplify right side
    21,194.91x = 250,532,470.26
  5. Step 5: Solve for x
    x = 250,532,470.26/21,194.91
  6. Step 6: Final answer
    x = 11,820.41

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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.