Home / 2,015.40-2,781.38-1,131.26

Finding the Fourth Proportional to 2,015.40, 2,781.38 and 1,131.26

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Solution

The fourth proportional to 2,015.40, 2,781.38 and 1,131.26 is: 1,561.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,015.40 : 2,781.38 = 1,131.26 : x
  2. Step 2: Convert to fraction form
    2,015.40/2,781.38 = 1,131.26/x
  3. Step 3: Cross multiply
    2,015.40x = 2,781.38 × 1,131.26
  4. Step 4: Simplify right side
    2,015.40x = 3,146,463.94
  5. Step 5: Solve for x
    x = 3,146,463.94/2,015.40
  6. Step 6: Final answer
    x = 1,561.21

Related Problems

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Half scale
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Double scale
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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.