Home / 31,729.48-43,781.12-18,111.30

Finding the Fourth Proportional to 31,729.48, 43,781.12 and 18,111.30

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Solution

The fourth proportional to 31,729.48, 43,781.12 and 18,111.30 is: 24,990.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,729.48 : 43,781.12 = 18,111.30 : x
  2. Step 2: Convert to fraction form
    31,729.48/43,781.12 = 18,111.30/x
  3. Step 3: Cross multiply
    31,729.48x = 43,781.12 × 18,111.30
  4. Step 4: Simplify right side
    31,729.48x = 792,932,811.84
  5. Step 5: Solve for x
    x = 792,932,811.84/31,729.48
  6. Step 6: Final answer
    x = 24,990.42

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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.