Home / 21,215.96-29,278.49-11,655.97

Finding the Fourth Proportional to 21,215.96, 29,278.49 and 11,655.97

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Solution

The fourth proportional to 21,215.96, 29,278.49 and 11,655.97 is: 16,085.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.96 : 29,278.49 = 11,655.97 : x
  2. Step 2: Convert to fraction form
    21,215.96/29,278.49 = 11,655.97/x
  3. Step 3: Cross multiply
    21,215.96x = 29,278.49 × 11,655.97
  4. Step 4: Simplify right side
    21,215.96x = 341,269,201.09
  5. Step 5: Solve for x
    x = 341,269,201.09/21,215.96
  6. Step 6: Final answer
    x = 16,085.49

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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.