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Finding the Fourth Proportional to 28,571.13, 42,865.20 and 8,851.14

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Solution

The fourth proportional to 28,571.13, 42,865.20 and 8,851.14 is: 13,279.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,571.13 : 42,865.20 = 8,851.14 : x
  2. Step 2: Convert to fraction form
    28,571.13/42,865.20 = 8,851.14/x
  3. Step 3: Cross multiply
    28,571.13x = 42,865.20 × 8,851.14
  4. Step 4: Simplify right side
    28,571.13x = 379,405,886.33
  5. Step 5: Solve for x
    x = 379,405,886.33/28,571.13
  6. Step 6: Final answer
    x = 13,279.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.