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Finding the Fourth Proportional to 5,015.56, 6,920.10 and 2,919.40

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Solution

The fourth proportional to 5,015.56, 6,920.10 and 2,919.40 is: 4,027.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,015.56 : 6,920.10 = 2,919.40 : x
  2. Step 2: Convert to fraction form
    5,015.56/6,920.10 = 2,919.40/x
  3. Step 3: Cross multiply
    5,015.56x = 6,920.10 × 2,919.40
  4. Step 4: Simplify right side
    5,015.56x = 20,202,539.94
  5. Step 5: Solve for x
    x = 20,202,539.94/5,015.56
  6. Step 6: Final answer
    x = 4,027.97

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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.