Home / 31,686.37-43,731.32-18,258.19

Finding the Fourth Proportional to 31,686.37, 43,731.32 and 18,258.19

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Solution

The fourth proportional to 31,686.37, 43,731.32 and 18,258.19 is: 25,198.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.37 : 43,731.32 = 18,258.19 : x
  2. Step 2: Convert to fraction form
    31,686.37/43,731.32 = 18,258.19/x
  3. Step 3: Cross multiply
    31,686.37x = 43,731.32 × 18,258.19
  4. Step 4: Simplify right side
    31,686.37x = 798,454,749.51
  5. Step 5: Solve for x
    x = 798,454,749.51/31,686.37
  6. Step 6: Final answer
    x = 25,198.68

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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.