Home / 3,925.88-5,417.79-2,157.38

Finding the Fourth Proportional to 3,925.88, 5,417.79 and 2,157.38

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Solution

The fourth proportional to 3,925.88, 5,417.79 and 2,157.38 is: 2,977.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,925.88 : 5,417.79 = 2,157.38 : x
  2. Step 2: Convert to fraction form
    3,925.88/5,417.79 = 2,157.38/x
  3. Step 3: Cross multiply
    3,925.88x = 5,417.79 × 2,157.38
  4. Step 4: Simplify right side
    3,925.88x = 11,688,231.79
  5. Step 5: Solve for x
    x = 11,688,231.79/3,925.88
  6. Step 6: Final answer
    x = 2,977.23

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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.