Home / 21,161.87-29,241.45-15,183.06

Finding the Fourth Proportional to 21,161.87, 29,241.45 and 15,183.06

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Solution

The fourth proportional to 21,161.87, 29,241.45 and 15,183.06 is: 20,979.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,161.87 : 29,241.45 = 15,183.06 : x
  2. Step 2: Convert to fraction form
    21,161.87/29,241.45 = 15,183.06/x
  3. Step 3: Cross multiply
    21,161.87x = 29,241.45 × 15,183.06
  4. Step 4: Simplify right side
    21,161.87x = 443,974,689.84
  5. Step 5: Solve for x
    x = 443,974,689.84/21,161.87
  6. Step 6: Final answer
    x = 20,979.93

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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.