Home / 5,128.40-7,080.96-3,141.66

Finding the Fourth Proportional to 5,128.40, 7,080.96 and 3,141.66

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Solution

The fourth proportional to 5,128.40, 7,080.96 and 3,141.66 is: 4,337.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.40 : 7,080.96 = 3,141.66 : x
  2. Step 2: Convert to fraction form
    5,128.40/7,080.96 = 3,141.66/x
  3. Step 3: Cross multiply
    5,128.40x = 7,080.96 × 3,141.66
  4. Step 4: Simplify right side
    5,128.40x = 22,245,968.79
  5. Step 5: Solve for x
    x = 22,245,968.79/5,128.40
  6. Step 6: Final answer
    x = 4,337.80

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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.