Home / 3,130.60-4,288.13-3,121.96

Finding the Fourth Proportional to 3,130.60, 4,288.13 and 3,121.96

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Solution

The fourth proportional to 3,130.60, 4,288.13 and 3,121.96 is: 4,276.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.60 : 4,288.13 = 3,121.96 : x
  2. Step 2: Convert to fraction form
    3,130.60/4,288.13 = 3,121.96/x
  3. Step 3: Cross multiply
    3,130.60x = 4,288.13 × 3,121.96
  4. Step 4: Simplify right side
    3,130.60x = 13,387,370.33
  5. Step 5: Solve for x
    x = 13,387,370.33/3,130.60
  6. Step 6: Final answer
    x = 4,276.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.