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Finding the Fourth Proportional to 5,015, 6,920.72 and 2,919.28

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Solution

The fourth proportional to 5,015, 6,920.72 and 2,919.28 is: 4,028.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,015 : 6,920.72 = 2,919.28 : x
  2. Step 2: Convert to fraction form
    5,015/6,920.72 = 2,919.28/x
  3. Step 3: Cross multiply
    5,015x = 6,920.72 × 2,919.28
  4. Step 4: Simplify right side
    5,015x = 20,203,519.48
  5. Step 5: Solve for x
    x = 20,203,519.48/5,015
  6. Step 6: Final answer
    x = 4,028.62

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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.