Home / 20,649,861.72-28,500,376.05-11,952,829.62

Finding the Fourth Proportional to 20,649,861.72, 28,500,376.05 and 11,952,829.62

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Solution

The fourth proportional to 20,649,861.72, 28,500,376.05 and 11,952,829.62 is: 16,496,969.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649,861.72 : 28,500,376.05 = 11,952,829.62 : x
  2. Step 2: Convert to fraction form
    20,649,861.72/28,500,376.05 = 11,952,829.62/x
  3. Step 3: Cross multiply
    20,649,861.72x = 28,500,376.05 × 11,952,829.62
  4. Step 4: Simplify right side
    20,649,861.72x = 340,660,139,031,578.56
  5. Step 5: Solve for x
    x = 340,660,139,031,578.56/20,649,861.72
  6. Step 6: Final answer
    x = 16,496,969.50

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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.