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Finding the Fourth Proportional to 31,655.48, 43,704.48 and 20,329.56

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Solution

The fourth proportional to 31,655.48, 43,704.48 and 20,329.56 is: 28,067.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,655.48 : 43,704.48 = 20,329.56 : x
  2. Step 2: Convert to fraction form
    31,655.48/43,704.48 = 20,329.56/x
  3. Step 3: Cross multiply
    31,655.48x = 43,704.48 × 20,329.56
  4. Step 4: Simplify right side
    31,655.48x = 888,492,848.43
  5. Step 5: Solve for x
    x = 888,492,848.43/31,655.48
  6. Step 6: Final answer
    x = 28,067.58

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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.