Home / 5,118.15-7,062.93-3,128.70

Finding the Fourth Proportional to 5,118.15, 7,062.93 and 3,128.70

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Solution

The fourth proportional to 5,118.15, 7,062.93 and 3,128.70 is: 4,317.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.15 : 7,062.93 = 3,128.70 : x
  2. Step 2: Convert to fraction form
    5,118.15/7,062.93 = 3,128.70/x
  3. Step 3: Cross multiply
    5,118.15x = 7,062.93 × 3,128.70
  4. Step 4: Simplify right side
    5,118.15x = 22,097,789.09
  5. Step 5: Solve for x
    x = 22,097,789.09/5,118.15
  6. Step 6: Final answer
    x = 4,317.53

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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.