Home / 21,268.36-31,891.94-12,386.68

Finding the Fourth Proportional to 21,268.36, 31,891.94 and 12,386.68

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Solution

The fourth proportional to 21,268.36, 31,891.94 and 12,386.68 is: 18,573.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,268.36 : 31,891.94 = 12,386.68 : x
  2. Step 2: Convert to fraction form
    21,268.36/31,891.94 = 12,386.68/x
  3. Step 3: Cross multiply
    21,268.36x = 31,891.94 × 12,386.68
  4. Step 4: Simplify right side
    21,268.36x = 395,035,255.36
  5. Step 5: Solve for x
    x = 395,035,255.36/21,268.36
  6. Step 6: Final answer
    x = 18,573.85

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1.5x scale

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.