Home / 5,178.60-7,146.65-2,940.40

Finding the Fourth Proportional to 5,178.60, 7,146.65 and 2,940.40

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Solution

The fourth proportional to 5,178.60, 7,146.65 and 2,940.40 is: 4,057.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.60 : 7,146.65 = 2,940.40 : x
  2. Step 2: Convert to fraction form
    5,178.60/7,146.65 = 2,940.40/x
  3. Step 3: Cross multiply
    5,178.60x = 7,146.65 × 2,940.40
  4. Step 4: Simplify right side
    5,178.60x = 21,014,020.18
  5. Step 5: Solve for x
    x = 21,014,020.18/5,178.60
  6. Step 6: Final answer
    x = 4,057.86

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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.