Home / 5,178.55-7,145.80-2,939.98

Finding the Fourth Proportional to 5,178.55, 7,145.80 and 2,939.98

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Solution

The fourth proportional to 5,178.55, 7,145.80 and 2,939.98 is: 4,056.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.55 : 7,145.80 = 2,939.98 : x
  2. Step 2: Convert to fraction form
    5,178.55/7,145.80 = 2,939.98/x
  3. Step 3: Cross multiply
    5,178.55x = 7,145.80 × 2,939.98
  4. Step 4: Simplify right side
    5,178.55x = 21,008,509.08
  5. Step 5: Solve for x
    x = 21,008,509.08/5,178.55
  6. Step 6: Final answer
    x = 4,056.83

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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.