Home / 5,173.71-7,139.73-2,815.85

Finding the Fourth Proportional to 5,173.71, 7,139.73 and 2,815.85

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Solution

The fourth proportional to 5,173.71, 7,139.73 and 2,815.85 is: 3,885.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173.71 : 7,139.73 = 2,815.85 : x
  2. Step 2: Convert to fraction form
    5,173.71/7,139.73 = 2,815.85/x
  3. Step 3: Cross multiply
    5,173.71x = 7,139.73 × 2,815.85
  4. Step 4: Simplify right side
    5,173.71x = 20,104,408.72
  5. Step 5: Solve for x
    x = 20,104,408.72/5,173.71
  6. Step 6: Final answer
    x = 3,885.88

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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.