Home / 5,178.31-7,146.07-2,820.45

Finding the Fourth Proportional to 5,178.31, 7,146.07 and 2,820.45

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Solution

The fourth proportional to 5,178.31, 7,146.07 and 2,820.45 is: 3,892.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,178.31 : 7,146.07 = 2,820.45 : x
  2. Step 2: Convert to fraction form
    5,178.31/7,146.07 = 2,820.45/x
  3. Step 3: Cross multiply
    5,178.31x = 7,146.07 × 2,820.45
  4. Step 4: Simplify right side
    5,178.31x = 20,155,119.03
  5. Step 5: Solve for x
    x = 20,155,119.03/5,178.31
  6. Step 6: Final answer
    x = 3,892.22

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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.