Home / 5,178.06-7,145.11-2,939.92

Finding the Fourth Proportional to 5,178.06, 7,145.11 and 2,939.92

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Solution

The fourth proportional to 5,178.06, 7,145.11 and 2,939.92 is: 4,056.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.06 : 7,145.11 = 2,939.92 : x
  2. Step 2: Convert to fraction form
    5,178.06/7,145.11 = 2,939.92/x
  3. Step 3: Cross multiply
    5,178.06x = 7,145.11 × 2,939.92
  4. Step 4: Simplify right side
    5,178.06x = 21,006,057.70
  5. Step 5: Solve for x
    x = 21,006,057.70/5,178.06
  6. Step 6: Final answer
    x = 4,056.74

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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.