Home / 5,179.95-7,139.78-3,665.55

Finding the Fourth Proportional to 5,179.95, 7,139.78 and 3,665.55

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Solution

The fourth proportional to 5,179.95, 7,139.78 and 3,665.55 is: 5,052.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.95 : 7,139.78 = 3,665.55 : x
  2. Step 2: Convert to fraction form
    5,179.95/7,139.78 = 3,665.55/x
  3. Step 3: Cross multiply
    5,179.95x = 7,139.78 × 3,665.55
  4. Step 4: Simplify right side
    5,179.95x = 26,171,242.77
  5. Step 5: Solve for x
    x = 26,171,242.77/5,179.95
  6. Step 6: Final answer
    x = 5,052.41

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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.