Home / 3,970.08-5,478.66-2,177.55

Finding the Fourth Proportional to 3,970.08, 5,478.66 and 2,177.55

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Solution

The fourth proportional to 3,970.08, 5,478.66 and 2,177.55 is: 3,004.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.08 : 5,478.66 = 2,177.55 : x
  2. Step 2: Convert to fraction form
    3,970.08/5,478.66 = 2,177.55/x
  3. Step 3: Cross multiply
    3,970.08x = 5,478.66 × 2,177.55
  4. Step 4: Simplify right side
    3,970.08x = 11,930,056.08
  5. Step 5: Solve for x
    x = 11,930,056.08/3,970.08
  6. Step 6: Final answer
    x = 3,004.99

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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.