Home / 5,178.58-7,146.39-2,820.71

Finding the Fourth Proportional to 5,178.58, 7,146.39 and 2,820.71

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Solution

The fourth proportional to 5,178.58, 7,146.39 and 2,820.71 is: 3,892.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.58 : 7,146.39 = 2,820.71 : x
  2. Step 2: Convert to fraction form
    5,178.58/7,146.39 = 2,820.71/x
  3. Step 3: Cross multiply
    5,178.58x = 7,146.39 × 2,820.71
  4. Step 4: Simplify right side
    5,178.58x = 20,157,893.74
  5. Step 5: Solve for x
    x = 20,157,893.74/5,178.58
  6. Step 6: Final answer
    x = 3,892.55

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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.