Home / 15,142.38-20,890.68-11,172.96

Finding the Fourth Proportional to 15,142.38, 20,890.68 and 11,172.96

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Solution

The fourth proportional to 15,142.38, 20,890.68 and 11,172.96 is: 15,414.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,142.38 : 20,890.68 = 11,172.96 : x
  2. Step 2: Convert to fraction form
    15,142.38/20,890.68 = 11,172.96/x
  3. Step 3: Cross multiply
    15,142.38x = 20,890.68 × 11,172.96
  4. Step 4: Simplify right side
    15,142.38x = 233,410,732.01
  5. Step 5: Solve for x
    x = 233,410,732.01/15,142.38
  6. Step 6: Final answer
    x = 15,414.40

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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.