Home / 8,075.85-12,119.37-3,145.53

Finding the Fourth Proportional to 8,075.85, 12,119.37 and 3,145.53

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Solution

The fourth proportional to 8,075.85, 12,119.37 and 3,145.53 is: 4,720.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,075.85 : 12,119.37 = 3,145.53 : x
  2. Step 2: Convert to fraction form
    8,075.85/12,119.37 = 3,145.53/x
  3. Step 3: Cross multiply
    8,075.85x = 12,119.37 × 3,145.53
  4. Step 4: Simplify right side
    8,075.85x = 38,121,841.92
  5. Step 5: Solve for x
    x = 38,121,841.92/8,075.85
  6. Step 6: Final answer
    x = 4,720.47

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1.5x scale

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.