Home / 5,176.78-7,143.74-2,818.91

Finding the Fourth Proportional to 5,176.78, 7,143.74 and 2,818.91

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Solution

The fourth proportional to 5,176.78, 7,143.74 and 2,818.91 is: 3,889.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,176.78 : 7,143.74 = 2,818.91 : x
  2. Step 2: Convert to fraction form
    5,176.78/7,143.74 = 2,818.91/x
  3. Step 3: Cross multiply
    5,176.78x = 7,143.74 × 2,818.91
  4. Step 4: Simplify right side
    5,176.78x = 20,137,546.03
  5. Step 5: Solve for x
    x = 20,137,546.03/5,176.78
  6. Step 6: Final answer
    x = 3,889.98

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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.