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Finding the Fourth Proportional to 18,663.82, 25,720.64 and 13,349.41

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Solution

The fourth proportional to 18,663.82, 25,720.64 and 13,349.41 is: 18,396.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,663.82 : 25,720.64 = 13,349.41 : x
  2. Step 2: Convert to fraction form
    18,663.82/25,720.64 = 13,349.41/x
  3. Step 3: Cross multiply
    18,663.82x = 25,720.64 × 13,349.41
  4. Step 4: Simplify right side
    18,663.82x = 343,355,287.83
  5. Step 5: Solve for x
    x = 343,355,287.83/18,663.82
  6. Step 6: Final answer
    x = 18,396.84

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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.