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Finding the Fourth Proportional to 15,015,978.54, 20,722,213.55 and 8,821,286.34

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Solution

The fourth proportional to 15,015,978.54, 20,722,213.55 and 8,821,286.34 is: 12,173,471.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,015,978.54 : 20,722,213.55 = 8,821,286.34 : x
  2. Step 2: Convert to fraction form
    15,015,978.54/20,722,213.55 = 8,821,286.34/x
  3. Step 3: Cross multiply
    15,015,978.54x = 20,722,213.55 × 8,821,286.34
  4. Step 4: Simplify right side
    15,015,978.54x = 182,796,579,323,177.91
  5. Step 5: Solve for x
    x = 182,796,579,323,177.91/15,015,978.54
  6. Step 6: Final answer
    x = 12,173,471.00

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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.