Home / 5,156.10-7,115.80-2,918.20

Finding the Fourth Proportional to 5,156.10, 7,115.80 and 2,918.20

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Solution

The fourth proportional to 5,156.10, 7,115.80 and 2,918.20 is: 4,027.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.10 : 7,115.80 = 2,918.20 : x
  2. Step 2: Convert to fraction form
    5,156.10/7,115.80 = 2,918.20/x
  3. Step 3: Cross multiply
    5,156.10x = 7,115.80 × 2,918.20
  4. Step 4: Simplify right side
    5,156.10x = 20,765,327.56
  5. Step 5: Solve for x
    x = 20,765,327.56/5,156.10
  6. Step 6: Final answer
    x = 4,027.33

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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.