Home / 20,731.57-28,614.20-13,176.43

Finding the Fourth Proportional to 20,731.57, 28,614.20 and 13,176.43

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Solution

The fourth proportional to 20,731.57, 28,614.20 and 13,176.43 is: 18,186.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.57 : 28,614.20 = 13,176.43 : x
  2. Step 2: Convert to fraction form
    20,731.57/28,614.20 = 13,176.43/x
  3. Step 3: Cross multiply
    20,731.57x = 28,614.20 × 13,176.43
  4. Step 4: Simplify right side
    20,731.57x = 377,032,865.89
  5. Step 5: Solve for x
    x = 377,032,865.89/20,731.57
  6. Step 6: Final answer
    x = 18,186.41

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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.