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Finding the Fourth Proportional to 14,109, 21,161.08 and 6,613.32

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Solution

The fourth proportional to 14,109, 21,161.08 and 6,613.32 is: 9,918.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,109 : 21,161.08 = 6,613.32 : x
  2. Step 2: Convert to fraction form
    14,109/21,161.08 = 6,613.32/x
  3. Step 3: Cross multiply
    14,109x = 21,161.08 × 6,613.32
  4. Step 4: Simplify right side
    14,109x = 139,944,993.59
  5. Step 5: Solve for x
    x = 139,944,993.59/14,109
  6. Step 6: Final answer
    x = 9,918.85

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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.