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Finding the Fourth Proportional to 28,505.32, 39,348.34 and 25,515.88

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Solution

The fourth proportional to 28,505.32, 39,348.34 and 25,515.88 is: 35,221.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,505.32 : 39,348.34 = 25,515.88 : x
  2. Step 2: Convert to fraction form
    28,505.32/39,348.34 = 25,515.88/x
  3. Step 3: Cross multiply
    28,505.32x = 39,348.34 × 25,515.88
  4. Step 4: Simplify right side
    28,505.32x = 1,004,007,521.64
  5. Step 5: Solve for x
    x = 1,004,007,521.64/28,505.32
  6. Step 6: Final answer
    x = 35,221.76

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.