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Finding the Fourth Proportional to 13,618.74, 18,792.84 and 7,649.25

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Solution

The fourth proportional to 13,618.74, 18,792.84 and 7,649.25 is: 10,555.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,618.74 : 18,792.84 = 7,649.25 : x
  2. Step 2: Convert to fraction form
    13,618.74/18,792.84 = 7,649.25/x
  3. Step 3: Cross multiply
    13,618.74x = 18,792.84 × 7,649.25
  4. Step 4: Simplify right side
    13,618.74x = 143,751,131.37
  5. Step 5: Solve for x
    x = 143,751,131.37/13,618.74
  6. Step 6: Final answer
    x = 10,555.39

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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.