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Finding the Fourth Proportional to 12,669.69, 19,006.08 and 5,279.16

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Solution

The fourth proportional to 12,669.69, 19,006.08 and 5,279.16 is: 7,919.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,669.69 : 19,006.08 = 5,279.16 : x
  2. Step 2: Convert to fraction form
    12,669.69/19,006.08 = 5,279.16/x
  3. Step 3: Cross multiply
    12,669.69x = 19,006.08 × 5,279.16
  4. Step 4: Simplify right side
    12,669.69x = 100,336,137.29
  5. Step 5: Solve for x
    x = 100,336,137.29/12,669.69
  6. Step 6: Final answer
    x = 7,919.38

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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.