Home / 3,125.19-4,309.23-2,131.05

Finding the Fourth Proportional to 3,125.19, 4,309.23 and 2,131.05

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Solution

The fourth proportional to 3,125.19, 4,309.23 and 2,131.05 is: 2,938.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.19 : 4,309.23 = 2,131.05 : x
  2. Step 2: Convert to fraction form
    3,125.19/4,309.23 = 2,131.05/x
  3. Step 3: Cross multiply
    3,125.19x = 4,309.23 × 2,131.05
  4. Step 4: Simplify right side
    3,125.19x = 9,183,184.59
  5. Step 5: Solve for x
    x = 9,183,184.59/3,125.19
  6. Step 6: Final answer
    x = 2,938.44

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Half scale
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Double scale
Find fourth proportional to 3,126.19, 4,310.61 and 2,132.05
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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.