Home / 5,402.80-8,106.72-2,115.04

Finding the Fourth Proportional to 5,402.80, 8,106.72 and 2,115.04

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Solution

The fourth proportional to 5,402.80, 8,106.72 and 2,115.04 is: 3,173.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,402.80 : 8,106.72 = 2,115.04 : x
  2. Step 2: Convert to fraction form
    5,402.80/8,106.72 = 2,115.04/x
  3. Step 3: Cross multiply
    5,402.80x = 8,106.72 × 2,115.04
  4. Step 4: Simplify right side
    5,402.80x = 17,146,037.07
  5. Step 5: Solve for x
    x = 17,146,037.07/5,402.80
  6. Step 6: Final answer
    x = 3,173.55

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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.