Home / 5,131.94-7,080.40-3,140.42

Finding the Fourth Proportional to 5,131.94, 7,080.40 and 3,140.42

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Solution

The fourth proportional to 5,131.94, 7,080.40 and 3,140.42 is: 4,332.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,131.94 : 7,080.40 = 3,140.42 : x
  2. Step 2: Convert to fraction form
    5,131.94/7,080.40 = 3,140.42/x
  3. Step 3: Cross multiply
    5,131.94x = 7,080.40 × 3,140.42
  4. Step 4: Simplify right side
    5,131.94x = 22,235,429.77
  5. Step 5: Solve for x
    x = 22,235,429.77/5,131.94
  6. Step 6: Final answer
    x = 4,332.75

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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.