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Finding the Fourth Proportional to 13,608,505.80, 20,412,758.70 and 8,569,657.80

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Solution

The fourth proportional to 13,608,505.80, 20,412,758.70 and 8,569,657.80 is: 12,854,486.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608,505.80 : 20,412,758.70 = 8,569,657.80 : x
  2. Step 2: Convert to fraction form
    13,608,505.80/20,412,758.70 = 8,569,657.80/x
  3. Step 3: Cross multiply
    13,608,505.80x = 20,412,758.70 × 8,569,657.80
  4. Step 4: Simplify right side
    13,608,505.80x = 174,930,356,812,972.88
  5. Step 5: Solve for x
    x = 174,930,356,812,972.88/13,608,505.80
  6. Step 6: Final answer
    x = 12,854,486.70

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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.