Home / 21,198.76-31,734.94-12,853.64

Finding the Fourth Proportional to 21,198.76, 31,734.94 and 12,853.64

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Solution

The fourth proportional to 21,198.76, 31,734.94 and 12,853.64 is: 19,242.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.76 : 31,734.94 = 12,853.64 : x
  2. Step 2: Convert to fraction form
    21,198.76/31,734.94 = 12,853.64/x
  3. Step 3: Cross multiply
    21,198.76x = 31,734.94 × 12,853.64
  4. Step 4: Simplify right side
    21,198.76x = 407,909,494.18
  5. Step 5: Solve for x
    x = 407,909,494.18/21,198.76
  6. Step 6: Final answer
    x = 19,242.14

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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.