Home / 3,925.57-5,417.31-2,157.20

Finding the Fourth Proportional to 3,925.57, 5,417.31 and 2,157.20

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Solution

The fourth proportional to 3,925.57, 5,417.31 and 2,157.20 is: 2,976.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,925.57 : 5,417.31 = 2,157.20 : x
  2. Step 2: Convert to fraction form
    3,925.57/5,417.31 = 2,157.20/x
  3. Step 3: Cross multiply
    3,925.57x = 5,417.31 × 2,157.20
  4. Step 4: Simplify right side
    3,925.57x = 11,686,221.13
  5. Step 5: Solve for x
    x = 11,686,221.13/3,925.57
  6. Step 6: Final answer
    x = 2,976.95

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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.