Home / 3,925.56-5,417.31-2,157.21

Finding the Fourth Proportional to 3,925.56, 5,417.31 and 2,157.21

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Solution

The fourth proportional to 3,925.56, 5,417.31 and 2,157.21 is: 2,976.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,925.56 : 5,417.31 = 2,157.21 : x
  2. Step 2: Convert to fraction form
    3,925.56/5,417.31 = 2,157.21/x
  3. Step 3: Cross multiply
    3,925.56x = 5,417.31 × 2,157.21
  4. Step 4: Simplify right side
    3,925.56x = 11,686,237.43
  5. Step 5: Solve for x
    x = 11,686,237.43/3,925.56
  6. Step 6: Final answer
    x = 2,976.96

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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.