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Finding the Fourth Proportional to 13,668.48, 18,862.07 and 7,699.79

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Solution

The fourth proportional to 13,668.48, 18,862.07 and 7,699.79 is: 10,625.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.48 : 18,862.07 = 7,699.79 : x
  2. Step 2: Convert to fraction form
    13,668.48/18,862.07 = 7,699.79/x
  3. Step 3: Cross multiply
    13,668.48x = 18,862.07 × 7,699.79
  4. Step 4: Simplify right side
    13,668.48x = 145,233,986.62
  5. Step 5: Solve for x
    x = 145,233,986.62/13,668.48
  6. Step 6: Final answer
    x = 10,625.47

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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.