Home / 31,531.80-43,499.04-18,777.72

Finding the Fourth Proportional to 31,531.80, 43,499.04 and 18,777.72

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Solution

The fourth proportional to 31,531.80, 43,499.04 and 18,777.72 is: 25,904.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,531.80 : 43,499.04 = 18,777.72 : x
  2. Step 2: Convert to fraction form
    31,531.80/43,499.04 = 18,777.72/x
  3. Step 3: Cross multiply
    31,531.80x = 43,499.04 × 18,777.72
  4. Step 4: Simplify right side
    31,531.80x = 816,812,793.39
  5. Step 5: Solve for x
    x = 816,812,793.39/31,531.80
  6. Step 6: Final answer
    x = 25,904.41

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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.