Home / 5,173.70-7,139.34-2,815.79

Finding the Fourth Proportional to 5,173.70, 7,139.34 and 2,815.79

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Solution

The fourth proportional to 5,173.70, 7,139.34 and 2,815.79 is: 3,885.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,173.70 : 7,139.34 = 2,815.79 : x
  2. Step 2: Convert to fraction form
    5,173.70/7,139.34 = 2,815.79/x
  3. Step 3: Cross multiply
    5,173.70x = 7,139.34 × 2,815.79
  4. Step 4: Simplify right side
    5,173.70x = 20,102,882.18
  5. Step 5: Solve for x
    x = 20,102,882.18/5,173.70
  6. Step 6: Final answer
    x = 3,885.59

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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.