Home / 3,515.84-5,271.15-2,128.87

Finding the Fourth Proportional to 3,515.84, 5,271.15 and 2,128.87

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Solution

The fourth proportional to 3,515.84, 5,271.15 and 2,128.87 is: 3,191.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,515.84 : 5,271.15 = 2,128.87 : x
  2. Step 2: Convert to fraction form
    3,515.84/5,271.15 = 2,128.87/x
  3. Step 3: Cross multiply
    3,515.84x = 5,271.15 × 2,128.87
  4. Step 4: Simplify right side
    3,515.84x = 11,221,593.10
  5. Step 5: Solve for x
    x = 11,221,593.10/3,515.84
  6. Step 6: Final answer
    x = 3,191.72

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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.