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Finding the Fourth Proportional to 15,519, 21,416.90 and 8,804.64

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Solution

The fourth proportional to 15,519, 21,416.90 and 8,804.64 is: 12,150.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,519 : 21,416.90 = 8,804.64 : x
  2. Step 2: Convert to fraction form
    15,519/21,416.90 = 8,804.64/x
  3. Step 3: Cross multiply
    15,519x = 21,416.90 × 8,804.64
  4. Step 4: Simplify right side
    15,519x = 188,568,050.39
  5. Step 5: Solve for x
    x = 188,568,050.39/15,519
  6. Step 6: Final answer
    x = 12,150.79

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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.