Home / 5,174.70-7,140.72-2,816.79

Finding the Fourth Proportional to 5,174.70, 7,140.72 and 2,816.79

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Solution

The fourth proportional to 5,174.70, 7,140.72 and 2,816.79 is: 3,886.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,174.70 : 7,140.72 = 2,816.79 : x
  2. Step 2: Convert to fraction form
    5,174.70/7,140.72 = 2,816.79/x
  3. Step 3: Cross multiply
    5,174.70x = 7,140.72 × 2,816.79
  4. Step 4: Simplify right side
    5,174.70x = 20,113,908.69
  5. Step 5: Solve for x
    x = 20,113,908.69/5,174.70
  6. Step 6: Final answer
    x = 3,886.97

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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.