Home / 7,755.90-10,712.16-5,115.30

Finding the Fourth Proportional to 7,755.90, 10,712.16 and 5,115.30

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Solution

The fourth proportional to 7,755.90, 10,712.16 and 5,115.30 is: 7,065.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,755.90 : 10,712.16 = 5,115.30 : x
  2. Step 2: Convert to fraction form
    7,755.90/10,712.16 = 5,115.30/x
  3. Step 3: Cross multiply
    7,755.90x = 10,712.16 × 5,115.30
  4. Step 4: Simplify right side
    7,755.90x = 54,795,912.05
  5. Step 5: Solve for x
    x = 54,795,912.05/7,755.90
  6. Step 6: Final answer
    x = 7,065.06

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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.