Home / 5,145.12-7,099.84-2,907.19

Finding the Fourth Proportional to 5,145.12, 7,099.84 and 2,907.19

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Solution

The fourth proportional to 5,145.12, 7,099.84 and 2,907.19 is: 4,011.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.12 : 7,099.84 = 2,907.19 : x
  2. Step 2: Convert to fraction form
    5,145.12/7,099.84 = 2,907.19/x
  3. Step 3: Cross multiply
    5,145.12x = 7,099.84 × 2,907.19
  4. Step 4: Simplify right side
    5,145.12x = 20,640,583.85
  5. Step 5: Solve for x
    x = 20,640,583.85/5,145.12
  6. Step 6: Final answer
    x = 4,011.68

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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.