Home / 7,122.30-10,685.13-2,739.90

Finding the Fourth Proportional to 7,122.30, 10,685.13 and 2,739.90

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Solution

The fourth proportional to 7,122.30, 10,685.13 and 2,739.90 is: 4,110.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,122.30 : 10,685.13 = 2,739.90 : x
  2. Step 2: Convert to fraction form
    7,122.30/10,685.13 = 2,739.90/x
  3. Step 3: Cross multiply
    7,122.30x = 10,685.13 × 2,739.90
  4. Step 4: Simplify right side
    7,122.30x = 29,276,187.69
  5. Step 5: Solve for x
    x = 29,276,187.69/7,122.30
  6. Step 6: Final answer
    x = 4,110.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.