Home / 20,729.21-31,067.80-8,869.05

Finding the Fourth Proportional to 20,729.21, 31,067.80 and 8,869.05

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Solution

The fourth proportional to 20,729.21, 31,067.80 and 8,869.05 is: 13,292.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,729.21 : 31,067.80 = 8,869.05 : x
  2. Step 2: Convert to fraction form
    20,729.21/31,067.80 = 8,869.05/x
  3. Step 3: Cross multiply
    20,729.21x = 31,067.80 × 8,869.05
  4. Step 4: Simplify right side
    20,729.21x = 275,541,849.42
  5. Step 5: Solve for x
    x = 275,541,849.42/20,729.21
  6. Step 6: Final answer
    x = 13,292.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.