Home / 5,178.56-7,146.45-2,820.69

Finding the Fourth Proportional to 5,178.56, 7,146.45 and 2,820.69

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Solution

The fourth proportional to 5,178.56, 7,146.45 and 2,820.69 is: 3,892.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.56 : 7,146.45 = 2,820.69 : x
  2. Step 2: Convert to fraction form
    5,178.56/7,146.45 = 2,820.69/x
  3. Step 3: Cross multiply
    5,178.56x = 7,146.45 × 2,820.69
  4. Step 4: Simplify right side
    5,178.56x = 20,157,920.05
  5. Step 5: Solve for x
    x = 20,157,920.05/5,178.56
  6. Step 6: Final answer
    x = 3,892.58

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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.