Home / 1,531.36-2,112.38-1,111.22

Finding the Fourth Proportional to 1,531.36, 2,112.38 and 1,111.22

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Solution

The fourth proportional to 1,531.36, 2,112.38 and 1,111.22 is: 1,532.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.36 : 2,112.38 = 1,111.22 : x
  2. Step 2: Convert to fraction form
    1,531.36/2,112.38 = 1,111.22/x
  3. Step 3: Cross multiply
    1,531.36x = 2,112.38 × 1,111.22
  4. Step 4: Simplify right side
    1,531.36x = 2,347,314.87
  5. Step 5: Solve for x
    x = 2,347,314.87/1,531.36
  6. Step 6: Final answer
    x = 1,532.83

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Half scale
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Double scale
Find fourth proportional to 1,532.36, 2,113.76 and 1,112.22
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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.