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Finding the Fourth Proportional to 28,704.92, 39,613.47 and 15,958.49

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Solution

The fourth proportional to 28,704.92, 39,613.47 and 15,958.49 is: 22,023.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,704.92 : 39,613.47 = 15,958.49 : x
  2. Step 2: Convert to fraction form
    28,704.92/39,613.47 = 15,958.49/x
  3. Step 3: Cross multiply
    28,704.92x = 39,613.47 × 15,958.49
  4. Step 4: Simplify right side
    28,704.92x = 632,171,164.86
  5. Step 5: Solve for x
    x = 632,171,164.86/28,704.92
  6. Step 6: Final answer
    x = 22,023.09

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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.