Home / 20,771.72-28,655.17-15,103.97

Finding the Fourth Proportional to 20,771.72, 28,655.17 and 15,103.97

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Solution

The fourth proportional to 20,771.72, 28,655.17 and 15,103.97 is: 20,836.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,771.72 : 28,655.17 = 15,103.97 : x
  2. Step 2: Convert to fraction form
    20,771.72/28,655.17 = 15,103.97/x
  3. Step 3: Cross multiply
    20,771.72x = 28,655.17 × 15,103.97
  4. Step 4: Simplify right side
    20,771.72x = 432,806,754.45
  5. Step 5: Solve for x
    x = 432,806,754.45/20,771.72
  6. Step 6: Final answer
    x = 20,836.35

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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.