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Finding the Fourth Proportional to 5,155.36, 7,115.42 and 2,917.24

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Solution

The fourth proportional to 5,155.36, 7,115.42 and 2,917.24 is: 4,026.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,155.36 : 7,115.42 = 2,917.24 : x
  2. Step 2: Convert to fraction form
    5,155.36/7,115.42 = 2,917.24/x
  3. Step 3: Cross multiply
    5,155.36x = 7,115.42 × 2,917.24
  4. Step 4: Simplify right side
    5,155.36x = 20,757,337.68
  5. Step 5: Solve for x
    x = 20,757,337.68/5,155.36
  6. Step 6: Final answer
    x = 4,026.36

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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.