Home / 5,178.36-7,145.94-2,820.36

Finding the Fourth Proportional to 5,178.36, 7,145.94 and 2,820.36

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Solution

The fourth proportional to 5,178.36, 7,145.94 and 2,820.36 is: 3,891.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.36 : 7,145.94 = 2,820.36 : x
  2. Step 2: Convert to fraction form
    5,178.36/7,145.94 = 2,820.36/x
  3. Step 3: Cross multiply
    5,178.36x = 7,145.94 × 2,820.36
  4. Step 4: Simplify right side
    5,178.36x = 20,154,123.34
  5. Step 5: Solve for x
    x = 20,154,123.34/5,178.36
  6. Step 6: Final answer
    x = 3,891.99

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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.