Home / 5,173.45-7,139.39-2,815.59

Finding the Fourth Proportional to 5,173.45, 7,139.39 and 2,815.59

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Solution

The fourth proportional to 5,173.45, 7,139.39 and 2,815.59 is: 3,885.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173.45 : 7,139.39 = 2,815.59 : x
  2. Step 2: Convert to fraction form
    5,173.45/7,139.39 = 2,815.59/x
  3. Step 3: Cross multiply
    5,173.45x = 7,139.39 × 2,815.59
  4. Step 4: Simplify right side
    5,173.45x = 20,101,623.62
  5. Step 5: Solve for x
    x = 20,101,623.62/5,173.45
  6. Step 6: Final answer
    x = 3,885.53

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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.