Home / 5,115.55-7,059.39-2,877.42

Finding the Fourth Proportional to 5,115.55, 7,059.39 and 2,877.42

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Solution

The fourth proportional to 5,115.55, 7,059.39 and 2,877.42 is: 3,970.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.55 : 7,059.39 = 2,877.42 : x
  2. Step 2: Convert to fraction form
    5,115.55/7,059.39 = 2,877.42/x
  3. Step 3: Cross multiply
    5,115.55x = 7,059.39 × 2,877.42
  4. Step 4: Simplify right side
    5,115.55x = 20,312,840.43
  5. Step 5: Solve for x
    x = 20,312,840.43/5,115.55
  6. Step 6: Final answer
    x = 3,970.80

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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.