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Finding the Fourth Proportional to 13,662.65, 18,854.96 and 7,613.43

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Solution

The fourth proportional to 13,662.65, 18,854.96 and 7,613.43 is: 10,506.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,662.65 : 18,854.96 = 7,613.43 : x
  2. Step 2: Convert to fraction form
    13,662.65/18,854.96 = 7,613.43/x
  3. Step 3: Cross multiply
    13,662.65x = 18,854.96 × 7,613.43
  4. Step 4: Simplify right side
    13,662.65x = 143,550,880.05
  5. Step 5: Solve for x
    x = 143,550,880.05/13,662.65
  6. Step 6: Final answer
    x = 10,506.81

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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.