Home / 5,168.80-7,131.40-2,930.64

Finding the Fourth Proportional to 5,168.80, 7,131.40 and 2,930.64

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Solution

The fourth proportional to 5,168.80, 7,131.40 and 2,930.64 is: 4,043.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,168.80 : 7,131.40 = 2,930.64 : x
  2. Step 2: Convert to fraction form
    5,168.80/7,131.40 = 2,930.64/x
  3. Step 3: Cross multiply
    5,168.80x = 7,131.40 × 2,930.64
  4. Step 4: Simplify right side
    5,168.80x = 20,899,566.10
  5. Step 5: Solve for x
    x = 20,899,566.10/5,168.80
  6. Step 6: Final answer
    x = 4,043.41

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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.