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Finding the Fourth Proportional to 18,937.28, 28,404.88 and 5,788.62

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Solution

The fourth proportional to 18,937.28, 28,404.88 and 5,788.62 is: 8,682.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.28 : 28,404.88 = 5,788.62 : x
  2. Step 2: Convert to fraction form
    18,937.28/28,404.88 = 5,788.62/x
  3. Step 3: Cross multiply
    18,937.28x = 28,404.88 × 5,788.62
  4. Step 4: Simplify right side
    18,937.28x = 164,425,041.99
  5. Step 5: Solve for x
    x = 164,425,041.99/18,937.28
  6. Step 6: Final answer
    x = 8,682.61

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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.