Home / 2,112.13-3,160.15-1,276.11

Finding the Fourth Proportional to 2,112.13, 3,160.15 and 1,276.11

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Solution

The fourth proportional to 2,112.13, 3,160.15 and 1,276.11 is: 1,909.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,112.13 : 3,160.15 = 1,276.11 : x
  2. Step 2: Convert to fraction form
    2,112.13/3,160.15 = 1,276.11/x
  3. Step 3: Cross multiply
    2,112.13x = 3,160.15 × 1,276.11
  4. Step 4: Simplify right side
    2,112.13x = 4,032,699.02
  5. Step 5: Solve for x
    x = 4,032,699.02/2,112.13
  6. Step 6: Final answer
    x = 1,909.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.