Home / 5,115.30-7,059.30-3,345.90

Finding the Fourth Proportional to 5,115.30, 7,059.30 and 3,345.90

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Solution

The fourth proportional to 5,115.30, 7,059.30 and 3,345.90 is: 4,617.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,115.30 : 7,059.30 = 3,345.90 : x
  2. Step 2: Convert to fraction form
    5,115.30/7,059.30 = 3,345.90/x
  3. Step 3: Cross multiply
    5,115.30x = 7,059.30 × 3,345.90
  4. Step 4: Simplify right side
    5,115.30x = 23,619,711.87
  5. Step 5: Solve for x
    x = 23,619,711.87/5,115.30
  6. Step 6: Final answer
    x = 4,617.46

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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.