Home / 21,126.12-29,167.62-13,575.75

Finding the Fourth Proportional to 21,126.12, 29,167.62 and 13,575.75

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Solution

The fourth proportional to 21,126.12, 29,167.62 and 13,575.75 is: 18,743.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.12 : 29,167.62 = 13,575.75 : x
  2. Step 2: Convert to fraction form
    21,126.12/29,167.62 = 13,575.75/x
  3. Step 3: Cross multiply
    21,126.12x = 29,167.62 × 13,575.75
  4. Step 4: Simplify right side
    21,126.12x = 395,972,317.22
  5. Step 5: Solve for x
    x = 395,972,317.22/21,126.12
  6. Step 6: Final answer
    x = 18,743.26

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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.