Home / 3,921.72-5,877.09-2,947.20

Finding the Fourth Proportional to 3,921.72, 5,877.09 and 2,947.20

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Solution

The fourth proportional to 3,921.72, 5,877.09 and 2,947.20 is: 4,416.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.72 : 5,877.09 = 2,947.20 : x
  2. Step 2: Convert to fraction form
    3,921.72/5,877.09 = 2,947.20/x
  3. Step 3: Cross multiply
    3,921.72x = 5,877.09 × 2,947.20
  4. Step 4: Simplify right side
    3,921.72x = 17,320,959.65
  5. Step 5: Solve for x
    x = 17,320,959.65/3,921.72
  6. Step 6: Final answer
    x = 4,416.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.