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Finding the Fourth Proportional to 36,429.28, 50,271.90 and 20,515.28

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Solution

The fourth proportional to 36,429.28, 50,271.90 and 20,515.28 is: 28,310.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,429.28 : 50,271.90 = 20,515.28 : x
  2. Step 2: Convert to fraction form
    36,429.28/50,271.90 = 20,515.28/x
  3. Step 3: Cross multiply
    36,429.28x = 50,271.90 × 20,515.28
  4. Step 4: Simplify right side
    36,429.28x = 1,031,342,104.63
  5. Step 5: Solve for x
    x = 1,031,342,104.63/36,429.28
  6. Step 6: Final answer
    x = 28,310.80

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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.