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Finding the Fourth Proportional to 18,788.90, 28,125.90 and 16,131.69

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Solution

The fourth proportional to 18,788.90, 28,125.90 and 16,131.69 is: 24,148.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,788.90 : 28,125.90 = 16,131.69 : x
  2. Step 2: Convert to fraction form
    18,788.90/28,125.90 = 16,131.69/x
  3. Step 3: Cross multiply
    18,788.90x = 28,125.90 × 16,131.69
  4. Step 4: Simplify right side
    18,788.90x = 453,718,299.77
  5. Step 5: Solve for x
    x = 453,718,299.77/18,788.90
  6. Step 6: Final answer
    x = 24,148.22

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1.5x scale

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.