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Finding the Fourth Proportional to 8,520,728.40, 12,774,871.80 and 3,469,438.80

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Solution

The fourth proportional to 8,520,728.40, 12,774,871.80 and 3,469,438.80 is: 5,201,625.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,520,728.40 : 12,774,871.80 = 3,469,438.80 : x
  2. Step 2: Convert to fraction form
    8,520,728.40/12,774,871.80 = 3,469,438.80/x
  3. Step 3: Cross multiply
    8,520,728.40x = 12,774,871.80 × 3,469,438.80
  4. Step 4: Simplify right side
    8,520,728.40x = 44,321,635,887,945.84
  5. Step 5: Solve for x
    x = 44,321,635,887,945.84/8,520,728.40
  6. Step 6: Final answer
    x = 5,201,625.24

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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.