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Finding the Fourth Proportional to 28,452.66, 39,265.74 and 15,879.84

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Solution

The fourth proportional to 28,452.66, 39,265.74 and 15,879.84 is: 21,914.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,452.66 : 39,265.74 = 15,879.84 : x
  2. Step 2: Convert to fraction form
    28,452.66/39,265.74 = 15,879.84/x
  3. Step 3: Cross multiply
    28,452.66x = 39,265.74 × 15,879.84
  4. Step 4: Simplify right side
    28,452.66x = 623,533,668.68
  5. Step 5: Solve for x
    x = 623,533,668.68/28,452.66
  6. Step 6: Final answer
    x = 21,914.78

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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.