Home / 31,621.11-43,638.81-18,194.40

Finding the Fourth Proportional to 31,621.11, 43,638.81 and 18,194.40

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Solution

The fourth proportional to 31,621.11, 43,638.81 and 18,194.40 is: 25,109.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,621.11 : 43,638.81 = 18,194.40 : x
  2. Step 2: Convert to fraction form
    31,621.11/43,638.81 = 18,194.40/x
  3. Step 3: Cross multiply
    31,621.11x = 43,638.81 × 18,194.40
  4. Step 4: Simplify right side
    31,621.11x = 793,981,896.44
  5. Step 5: Solve for x
    x = 793,981,896.44/31,621.11
  6. Step 6: Final answer
    x = 25,109.24

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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.