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Finding the Fourth Proportional to 13,424.26, 18,525.99 and 7,456.38

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Solution

The fourth proportional to 13,424.26, 18,525.99 and 7,456.38 is: 10,290.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,424.26 : 18,525.99 = 7,456.38 : x
  2. Step 2: Convert to fraction form
    13,424.26/18,525.99 = 7,456.38/x
  3. Step 3: Cross multiply
    13,424.26x = 18,525.99 × 7,456.38
  4. Step 4: Simplify right side
    13,424.26x = 138,136,728.69
  5. Step 5: Solve for x
    x = 138,136,728.69/13,424.26
  6. Step 6: Final answer
    x = 10,290.09

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Double scale
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Similar ratio
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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.