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Finding the Fourth Proportional to 13,647.26, 18,833 and 7,678.92

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Solution

The fourth proportional to 13,647.26, 18,833 and 7,678.92 is: 10,596.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,647.26 : 18,833 = 7,678.92 : x
  2. Step 2: Convert to fraction form
    13,647.26/18,833 = 7,678.92/x
  3. Step 3: Cross multiply
    13,647.26x = 18,833 × 7,678.92
  4. Step 4: Simplify right side
    13,647.26x = 144,617,100.36
  5. Step 5: Solve for x
    x = 144,617,100.36/13,647.26
  6. Step 6: Final answer
    x = 10,596.79

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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.