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Finding the Fourth Proportional to 14,590.64, 20,131.08 and 8,619.68

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Solution

The fourth proportional to 14,590.64, 20,131.08 and 8,619.68 is: 11,892.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,590.64 : 20,131.08 = 8,619.68 : x
  2. Step 2: Convert to fraction form
    14,590.64/20,131.08 = 8,619.68/x
  3. Step 3: Cross multiply
    14,590.64x = 20,131.08 × 8,619.68
  4. Step 4: Simplify right side
    14,590.64x = 173,523,467.65
  5. Step 5: Solve for x
    x = 173,523,467.65/14,590.64
  6. Step 6: Final answer
    x = 11,892.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.