Home / 3,970.24-5,478.60-2,177.69

Finding the Fourth Proportional to 3,970.24, 5,478.60 and 2,177.69

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Solution

The fourth proportional to 3,970.24, 5,478.60 and 2,177.69 is: 3,005.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.24 : 5,478.60 = 2,177.69 : x
  2. Step 2: Convert to fraction form
    3,970.24/5,478.60 = 2,177.69/x
  3. Step 3: Cross multiply
    3,970.24x = 5,478.60 × 2,177.69
  4. Step 4: Simplify right side
    3,970.24x = 11,930,673.21
  5. Step 5: Solve for x
    x = 11,930,673.21/3,970.24
  6. Step 6: Final answer
    x = 3,005.03

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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.