Home / 21,268.74-31,907.89-6,478.83

Finding the Fourth Proportional to 21,268.74, 31,907.89 and 6,478.83

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Solution

The fourth proportional to 21,268.74, 31,907.89 and 6,478.83 is: 9,719.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.74 : 31,907.89 = 6,478.83 : x
  2. Step 2: Convert to fraction form
    21,268.74/31,907.89 = 6,478.83/x
  3. Step 3: Cross multiply
    21,268.74x = 31,907.89 × 6,478.83
  4. Step 4: Simplify right side
    21,268.74x = 206,725,794.97
  5. Step 5: Solve for x
    x = 206,725,794.97/21,268.74
  6. Step 6: Final answer
    x = 9,719.70

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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.