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Finding the Fourth Proportional to 15,812.86, 21,819.11 and 9,442.03

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Solution

The fourth proportional to 15,812.86, 21,819.11 and 9,442.03 is: 13,028.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,812.86 : 21,819.11 = 9,442.03 : x
  2. Step 2: Convert to fraction form
    15,812.86/21,819.11 = 9,442.03/x
  3. Step 3: Cross multiply
    15,812.86x = 21,819.11 × 9,442.03
  4. Step 4: Simplify right side
    15,812.86x = 206,016,660.25
  5. Step 5: Solve for x
    x = 206,016,660.25/15,812.86
  6. Step 6: Final answer
    x = 13,028.43

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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.