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Finding the Fourth Proportional to 18,669,991.70, 28,004,987.55 and 16,430,503.70

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Solution

The fourth proportional to 18,669,991.70, 28,004,987.55 and 16,430,503.70 is: 24,645,755.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,669,991.70 : 28,004,987.55 = 16,430,503.70 : x
  2. Step 2: Convert to fraction form
    18,669,991.70/28,004,987.55 = 16,430,503.70/x
  3. Step 3: Cross multiply
    18,669,991.70x = 28,004,987.55 × 16,430,503.70
  4. Step 4: Simplify right side
    18,669,991.70x = 460,136,051,558,728.94
  5. Step 5: Solve for x
    x = 460,136,051,558,728.94/18,669,991.70
  6. Step 6: Final answer
    x = 24,645,755.55

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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.