Home / 31,686.38-43,731.81-18,255.02

Finding the Fourth Proportional to 31,686.38, 43,731.81 and 18,255.02

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Solution

The fourth proportional to 31,686.38, 43,731.81 and 18,255.02 is: 25,194.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.38 : 43,731.81 = 18,255.02 : x
  2. Step 2: Convert to fraction form
    31,686.38/43,731.81 = 18,255.02/x
  3. Step 3: Cross multiply
    31,686.38x = 43,731.81 × 18,255.02
  4. Step 4: Simplify right side
    31,686.38x = 798,325,066.19
  5. Step 5: Solve for x
    x = 798,325,066.19/31,686.38
  6. Step 6: Final answer
    x = 25,194.58

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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.