Home / 5,178.09-7,145.49-2,939.91

Finding the Fourth Proportional to 5,178.09, 7,145.49 and 2,939.91

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Solution

The fourth proportional to 5,178.09, 7,145.49 and 2,939.91 is: 4,056.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.09 : 7,145.49 = 2,939.91 : x
  2. Step 2: Convert to fraction form
    5,178.09/7,145.49 = 2,939.91/x
  3. Step 3: Cross multiply
    5,178.09x = 7,145.49 × 2,939.91
  4. Step 4: Simplify right side
    5,178.09x = 21,007,097.51
  5. Step 5: Solve for x
    x = 21,007,097.51/5,178.09
  6. Step 6: Final answer
    x = 4,056.92

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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.