Home / 5,178.54-7,146.50-2,820.68

Finding the Fourth Proportional to 5,178.54, 7,146.50 and 2,820.68

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Solution

The fourth proportional to 5,178.54, 7,146.50 and 2,820.68 is: 3,892.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.54 : 7,146.50 = 2,820.68 : x
  2. Step 2: Convert to fraction form
    5,178.54/7,146.50 = 2,820.68/x
  3. Step 3: Cross multiply
    5,178.54x = 7,146.50 × 2,820.68
  4. Step 4: Simplify right side
    5,178.54x = 20,157,939.78
  5. Step 5: Solve for x
    x = 20,157,939.78/5,178.54
  6. Step 6: Final answer
    x = 3,892.59

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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.