Home / 4,139.80-5,715.78-2,814.60

Finding the Fourth Proportional to 4,139.80, 5,715.78 and 2,814.60

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Solution

The fourth proportional to 4,139.80, 5,715.78 and 2,814.60 is: 3,886.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,139.80 : 5,715.78 = 2,814.60 : x
  2. Step 2: Convert to fraction form
    4,139.80/5,715.78 = 2,814.60/x
  3. Step 3: Cross multiply
    4,139.80x = 5,715.78 × 2,814.60
  4. Step 4: Simplify right side
    4,139.80x = 16,087,634.39
  5. Step 5: Solve for x
    x = 16,087,634.39/4,139.80
  6. Step 6: Final answer
    x = 3,886.09

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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.