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Finding the Fourth Proportional to 13,943,910.90, 20,915,866.35 and 8,487,783.30

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Solution

The fourth proportional to 13,943,910.90, 20,915,866.35 and 8,487,783.30 is: 12,731,674.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,943,910.90 : 20,915,866.35 = 8,487,783.30 : x
  2. Step 2: Convert to fraction form
    13,943,910.90/20,915,866.35 = 8,487,783.30/x
  3. Step 3: Cross multiply
    13,943,910.90x = 20,915,866.35 × 8,487,783.30
  4. Step 4: Simplify right side
    13,943,910.90x = 177,529,341,110,561.97
  5. Step 5: Solve for x
    x = 177,529,341,110,561.97/13,943,910.90
  6. Step 6: Final answer
    x = 12,731,674.95

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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.