Home / 21,742.89-29,998.38-12,181.49

Finding the Fourth Proportional to 21,742.89, 29,998.38 and 12,181.49

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Solution

The fourth proportional to 21,742.89, 29,998.38 and 12,181.49 is: 16,806.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,742.89 : 29,998.38 = 12,181.49 : x
  2. Step 2: Convert to fraction form
    21,742.89/29,998.38 = 12,181.49/x
  3. Step 3: Cross multiply
    21,742.89x = 29,998.38 × 12,181.49
  4. Step 4: Simplify right side
    21,742.89x = 365,424,974.17
  5. Step 5: Solve for x
    x = 365,424,974.17/21,742.89
  6. Step 6: Final answer
    x = 16,806.65

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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.