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Finding the Fourth Proportional to 15,148,905.20, 20,906,005.08 and 8,959,257.80

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Solution

The fourth proportional to 15,148,905.20, 20,906,005.08 and 8,959,257.80 is: 12,364,080.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,148,905.20 : 20,906,005.08 = 8,959,257.80 : x
  2. Step 2: Convert to fraction form
    15,148,905.20/20,906,005.08 = 8,959,257.80/x
  3. Step 3: Cross multiply
    15,148,905.20x = 20,906,005.08 × 8,959,257.80
  4. Step 4: Simplify right side
    15,148,905.20x = 187,302,289,079,829.62
  5. Step 5: Solve for x
    x = 187,302,289,079,829.62/15,148,905.20
  6. Step 6: Final answer
    x = 12,364,080.88

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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.