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Finding the Fourth Proportional to 18,758.78, 28,152 and 8,898.08

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Solution

The fourth proportional to 18,758.78, 28,152 and 8,898.08 is: 13,353.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,758.78 : 28,152 = 8,898.08 : x
  2. Step 2: Convert to fraction form
    18,758.78/28,152 = 8,898.08/x
  3. Step 3: Cross multiply
    18,758.78x = 28,152 × 8,898.08
  4. Step 4: Simplify right side
    18,758.78x = 250,498,748.16
  5. Step 5: Solve for x
    x = 250,498,748.16/18,758.78
  6. Step 6: Final answer
    x = 13,353.68

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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.