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Finding the Fourth Proportional to 18,748.70, 28,136.90 and 8,888.02

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Solution

The fourth proportional to 18,748.70, 28,136.90 and 8,888.02 is: 13,338.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,748.70 : 28,136.90 = 8,888.02 : x
  2. Step 2: Convert to fraction form
    18,748.70/28,136.90 = 8,888.02/x
  3. Step 3: Cross multiply
    18,748.70x = 28,136.90 × 8,888.02
  4. Step 4: Simplify right side
    18,748.70x = 250,081,329.94
  5. Step 5: Solve for x
    x = 250,081,329.94/18,748.70
  6. Step 6: Final answer
    x = 13,338.60

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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.