Home / 5,431.92-8,148.52-1,921.20

Finding the Fourth Proportional to 5,431.92, 8,148.52 and 1,921.20

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Solution

The fourth proportional to 5,431.92, 8,148.52 and 1,921.20 is: 2,882.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.92 : 8,148.52 = 1,921.20 : x
  2. Step 2: Convert to fraction form
    5,431.92/8,148.52 = 1,921.20/x
  3. Step 3: Cross multiply
    5,431.92x = 8,148.52 × 1,921.20
  4. Step 4: Simplify right side
    5,431.92x = 15,654,936.62
  5. Step 5: Solve for x
    x = 15,654,936.62/5,431.92
  6. Step 6: Final answer
    x = 2,882.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.