Home / 3,979.28-5,493.87-2,565.40

Finding the Fourth Proportional to 3,979.28, 5,493.87 and 2,565.40

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Solution

The fourth proportional to 3,979.28, 5,493.87 and 2,565.40 is: 3,541.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.28 : 5,493.87 = 2,565.40 : x
  2. Step 2: Convert to fraction form
    3,979.28/5,493.87 = 2,565.40/x
  3. Step 3: Cross multiply
    3,979.28x = 5,493.87 × 2,565.40
  4. Step 4: Simplify right side
    3,979.28x = 14,093,946.63
  5. Step 5: Solve for x
    x = 14,093,946.63/3,979.28
  6. Step 6: Final answer
    x = 3,541.83

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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.