Home / 21,678.08-29,911.80-12,725.96

Finding the Fourth Proportional to 21,678.08, 29,911.80 and 12,725.96

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Solution

The fourth proportional to 21,678.08, 29,911.80 and 12,725.96 is: 17,559.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,678.08 : 29,911.80 = 12,725.96 : x
  2. Step 2: Convert to fraction form
    21,678.08/29,911.80 = 12,725.96/x
  3. Step 3: Cross multiply
    21,678.08x = 29,911.80 × 12,725.96
  4. Step 4: Simplify right side
    21,678.08x = 380,656,370.33
  5. Step 5: Solve for x
    x = 380,656,370.33/21,678.08
  6. Step 6: Final answer
    x = 17,559.51

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.