Home / 5,431.05-8,128.89-2,959.74

Finding the Fourth Proportional to 5,431.05, 8,128.89 and 2,959.74

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Solution

The fourth proportional to 5,431.05, 8,128.89 and 2,959.74 is: 4,429.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.05 : 8,128.89 = 2,959.74 : x
  2. Step 2: Convert to fraction form
    5,431.05/8,128.89 = 2,959.74/x
  3. Step 3: Cross multiply
    5,431.05x = 8,128.89 × 2,959.74
  4. Step 4: Simplify right side
    5,431.05x = 24,059,400.89
  5. Step 5: Solve for x
    x = 24,059,400.89/5,431.05
  6. Step 6: Final answer
    x = 4,429.97

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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.