Home / 31,186.20-43,042.86-18,617.88

Finding the Fourth Proportional to 31,186.20, 43,042.86 and 18,617.88

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Solution

The fourth proportional to 31,186.20, 43,042.86 and 18,617.88 is: 25,696.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,186.20 : 43,042.86 = 18,617.88 : x
  2. Step 2: Convert to fraction form
    31,186.20/43,042.86 = 18,617.88/x
  3. Step 3: Cross multiply
    31,186.20x = 43,042.86 × 18,617.88
  4. Step 4: Simplify right side
    31,186.20x = 801,366,802.34
  5. Step 5: Solve for x
    x = 801,366,802.34/31,186.20
  6. Step 6: Final answer
    x = 25,696.20

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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.