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Finding the Fourth Proportional to 18,908.78, 28,354.94 and 5,758.07

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Solution

The fourth proportional to 18,908.78, 28,354.94 and 5,758.07 is: 8,634.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,908.78 : 28,354.94 = 5,758.07 : x
  2. Step 2: Convert to fraction form
    18,908.78/28,354.94 = 5,758.07/x
  3. Step 3: Cross multiply
    18,908.78x = 28,354.94 × 5,758.07
  4. Step 4: Simplify right side
    18,908.78x = 163,269,700.58
  5. Step 5: Solve for x
    x = 163,269,700.58/18,908.78
  6. Step 6: Final answer
    x = 8,634.60

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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.