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Finding the Fourth Proportional to 38,447.21, 52,978.41 and 28,359.68

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Solution

The fourth proportional to 38,447.21, 52,978.41 and 28,359.68 is: 39,078.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,447.21 : 52,978.41 = 28,359.68 : x
  2. Step 2: Convert to fraction form
    38,447.21/52,978.41 = 28,359.68/x
  3. Step 3: Cross multiply
    38,447.21x = 52,978.41 × 28,359.68
  4. Step 4: Simplify right side
    38,447.21x = 1,502,450,489.62
  5. Step 5: Solve for x
    x = 1,502,450,489.62/38,447.21
  6. Step 6: Final answer
    x = 39,078.27

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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.