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Finding the Fourth Proportional to 31,690.88, 43,738.02 and 18,259.52

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Solution

The fourth proportional to 31,690.88, 43,738.02 and 18,259.52 is: 25,200.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,690.88 : 43,738.02 = 18,259.52 : x
  2. Step 2: Convert to fraction form
    31,690.88/43,738.02 = 18,259.52/x
  3. Step 3: Cross multiply
    31,690.88x = 43,738.02 × 18,259.52
  4. Step 4: Simplify right side
    31,690.88x = 798,635,250.95
  5. Step 5: Solve for x
    x = 798,635,250.95/31,690.88
  6. Step 6: Final answer
    x = 25,200.79

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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.