Home / 31,540.17-43,531.74-18,120.63

Finding the Fourth Proportional to 31,540.17, 43,531.74 and 18,120.63

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Solution

The fourth proportional to 31,540.17, 43,531.74 and 18,120.63 is: 25,010.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,540.17 : 43,531.74 = 18,120.63 : x
  2. Step 2: Convert to fraction form
    31,540.17/43,531.74 = 18,120.63/x
  3. Step 3: Cross multiply
    31,540.17x = 43,531.74 × 18,120.63
  4. Step 4: Simplify right side
    31,540.17x = 788,822,553.80
  5. Step 5: Solve for x
    x = 788,822,553.80/31,540.17
  6. Step 6: Final answer
    x = 25,010.09

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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.