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Finding the Fourth Proportional to 5,157.57, 7,117.44 and 2,919.41

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Solution

The fourth proportional to 5,157.57, 7,117.44 and 2,919.41 is: 4,028.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,157.57 : 7,117.44 = 2,919.41 : x
  2. Step 2: Convert to fraction form
    5,157.57/7,117.44 = 2,919.41/x
  3. Step 3: Cross multiply
    5,157.57x = 7,117.44 × 2,919.41
  4. Step 4: Simplify right side
    5,157.57x = 20,778,725.51
  5. Step 5: Solve for x
    x = 20,778,725.51/5,157.57
  6. Step 6: Final answer
    x = 4,028.78

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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.