Home / 5,174.31-7,140.58-2,816.45

Finding the Fourth Proportional to 5,174.31, 7,140.58 and 2,816.45

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Solution

The fourth proportional to 5,174.31, 7,140.58 and 2,816.45 is: 3,886.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,174.31 : 7,140.58 = 2,816.45 : x
  2. Step 2: Convert to fraction form
    5,174.31/7,140.58 = 2,816.45/x
  3. Step 3: Cross multiply
    5,174.31x = 7,140.58 × 2,816.45
  4. Step 4: Simplify right side
    5,174.31x = 20,111,043.80
  5. Step 5: Solve for x
    x = 20,111,043.80/5,174.31
  6. Step 6: Final answer
    x = 3,886.71

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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.