Home / 3,970.05-5,478.60-2,177.53

Finding the Fourth Proportional to 3,970.05, 5,478.60 and 2,177.53

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Solution

The fourth proportional to 3,970.05, 5,478.60 and 2,177.53 is: 3,004.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,970.05 : 5,478.60 = 2,177.53 : x
  2. Step 2: Convert to fraction form
    3,970.05/5,478.60 = 2,177.53/x
  3. Step 3: Cross multiply
    3,970.05x = 5,478.60 × 2,177.53
  4. Step 4: Simplify right side
    3,970.05x = 11,929,815.86
  5. Step 5: Solve for x
    x = 11,929,815.86/3,970.05
  6. Step 6: Final answer
    x = 3,004.95

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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.