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Finding the Fourth Proportional to 18,722.91, 28,070.48 and 8,850.65

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Solution

The fourth proportional to 18,722.91, 28,070.48 and 8,850.65 is: 13,269.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,722.91 : 28,070.48 = 8,850.65 : x
  2. Step 2: Convert to fraction form
    18,722.91/28,070.48 = 8,850.65/x
  3. Step 3: Cross multiply
    18,722.91x = 28,070.48 × 8,850.65
  4. Step 4: Simplify right side
    18,722.91x = 248,441,809.21
  5. Step 5: Solve for x
    x = 248,441,809.21/18,722.91
  6. Step 6: Final answer
    x = 13,269.40

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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.