Home / 31,511.43-43,471.61-21,299.19

Finding the Fourth Proportional to 31,511.43, 43,471.61 and 21,299.19

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Solution

The fourth proportional to 31,511.43, 43,471.61 and 21,299.19 is: 29,383.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,511.43 : 43,471.61 = 21,299.19 : x
  2. Step 2: Convert to fraction form
    31,511.43/43,471.61 = 21,299.19/x
  3. Step 3: Cross multiply
    31,511.43x = 43,471.61 × 21,299.19
  4. Step 4: Simplify right side
    31,511.43x = 925,909,974.50
  5. Step 5: Solve for x
    x = 925,909,974.50/31,511.43
  6. Step 6: Final answer
    x = 29,383.31

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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.