Home / 31,686.45-43,731.99-18,255.15

Finding the Fourth Proportional to 31,686.45, 43,731.99 and 18,255.15

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Solution

The fourth proportional to 31,686.45, 43,731.99 and 18,255.15 is: 25,194.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,686.45 : 43,731.99 = 18,255.15 : x
  2. Step 2: Convert to fraction form
    31,686.45/43,731.99 = 18,255.15/x
  3. Step 3: Cross multiply
    31,686.45x = 43,731.99 × 18,255.15
  4. Step 4: Simplify right side
    31,686.45x = 798,333,727.31
  5. Step 5: Solve for x
    x = 798,333,727.31/31,686.45
  6. Step 6: Final answer
    x = 25,194.80

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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.