Home / 5,156.12-7,115.56-2,918.00

Finding the Fourth Proportional to 5,156.12, 7,115.56 and 2,918.00

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Solution

The fourth proportional to 5,156.12, 7,115.56 and 2,918.00 is: 4,026.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.12 : 7,115.56 = 2,918.00 : x
  2. Step 2: Convert to fraction form
    5,156.12/7,115.56 = 2,918.00/x
  3. Step 3: Cross multiply
    5,156.12x = 7,115.56 × 2,918.00
  4. Step 4: Simplify right side
    5,156.12x = 20,763,171.70
  5. Step 5: Solve for x
    x = 20,763,171.70/5,156.12
  6. Step 6: Final answer
    x = 4,026.90

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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.