Home / 3,907.28-5,392.06-2,139.05

Finding the Fourth Proportional to 3,907.28, 5,392.06 and 2,139.05

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Solution

The fourth proportional to 3,907.28, 5,392.06 and 2,139.05 is: 2,951.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,907.28 : 5,392.06 = 2,139.05 : x
  2. Step 2: Convert to fraction form
    3,907.28/5,392.06 = 2,139.05/x
  3. Step 3: Cross multiply
    3,907.28x = 5,392.06 × 2,139.05
  4. Step 4: Simplify right side
    3,907.28x = 11,533,885.94
  5. Step 5: Solve for x
    x = 11,533,885.94/3,907.28
  6. Step 6: Final answer
    x = 2,951.90

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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.