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Finding the Fourth Proportional to 8,996,462.40, 13,494,693.60 and 8,128,660.80

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Solution

The fourth proportional to 8,996,462.40, 13,494,693.60 and 8,128,660.80 is: 12,192,991.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,996,462.40 : 13,494,693.60 = 8,128,660.80 : x
  2. Step 2: Convert to fraction form
    8,996,462.40/13,494,693.60 = 8,128,660.80/x
  3. Step 3: Cross multiply
    8,996,462.40x = 13,494,693.60 × 8,128,660.80
  4. Step 4: Simplify right side
    8,996,462.40x = 109,693,786,874,330.88
  5. Step 5: Solve for x
    x = 109,693,786,874,330.88/8,996,462.40
  6. Step 6: Final answer
    x = 12,192,991.20

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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.