Home / 21,656.75-29,886.33-11,720.75

Finding the Fourth Proportional to 21,656.75, 29,886.33 and 11,720.75

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Solution

The fourth proportional to 21,656.75, 29,886.33 and 11,720.75 is: 16,174.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,656.75 : 29,886.33 = 11,720.75 : x
  2. Step 2: Convert to fraction form
    21,656.75/29,886.33 = 11,720.75/x
  3. Step 3: Cross multiply
    21,656.75x = 29,886.33 × 11,720.75
  4. Step 4: Simplify right side
    21,656.75x = 350,290,202.35
  5. Step 5: Solve for x
    x = 350,290,202.35/21,656.75
  6. Step 6: Final answer
    x = 16,174.64

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1.5x scale

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.