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Finding the Fourth Proportional to 13,613.92, 18,783.91 and 7,945.43

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Solution

The fourth proportional to 13,613.92, 18,783.91 and 7,945.43 is: 10,962.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,613.92 : 18,783.91 = 7,945.43 : x
  2. Step 2: Convert to fraction form
    13,613.92/18,783.91 = 7,945.43/x
  3. Step 3: Cross multiply
    13,613.92x = 18,783.91 × 7,945.43
  4. Step 4: Simplify right side
    13,613.92x = 149,246,248.46
  5. Step 5: Solve for x
    x = 149,246,248.46/13,613.92
  6. Step 6: Final answer
    x = 10,962.77

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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.