Home / 21,101.09-29,118.43-11,539.12

Finding the Fourth Proportional to 21,101.09, 29,118.43 and 11,539.12

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Solution

The fourth proportional to 21,101.09, 29,118.43 and 11,539.12 is: 15,923.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,101.09 : 29,118.43 = 11,539.12 : x
  2. Step 2: Convert to fraction form
    21,101.09/29,118.43 = 11,539.12/x
  3. Step 3: Cross multiply
    21,101.09x = 29,118.43 × 11,539.12
  4. Step 4: Simplify right side
    21,101.09x = 336,000,989.30
  5. Step 5: Solve for x
    x = 336,000,989.30/21,101.09
  6. Step 6: Final answer
    x = 15,923.39

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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.