Home / 5,178.38-7,146.35-2,940.18

Finding the Fourth Proportional to 5,178.38, 7,146.35 and 2,940.18

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Solution

The fourth proportional to 5,178.38, 7,146.35 and 2,940.18 is: 4,057.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.38 : 7,146.35 = 2,940.18 : x
  2. Step 2: Convert to fraction form
    5,178.38/7,146.35 = 2,940.18/x
  3. Step 3: Cross multiply
    5,178.38x = 7,146.35 × 2,940.18
  4. Step 4: Simplify right side
    5,178.38x = 21,011,558.51
  5. Step 5: Solve for x
    x = 21,011,558.51/5,178.38
  6. Step 6: Final answer
    x = 4,057.55

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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.