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Finding the Fourth Proportional to 13,668.10, 18,862.06 and 7,699.86

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Solution

The fourth proportional to 13,668.10, 18,862.06 and 7,699.86 is: 10,625.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668.10 : 18,862.06 = 7,699.86 : x
  2. Step 2: Convert to fraction form
    13,668.10/18,862.06 = 7,699.86/x
  3. Step 3: Cross multiply
    13,668.10x = 18,862.06 × 7,699.86
  4. Step 4: Simplify right side
    13,668.10x = 145,235,221.31
  5. Step 5: Solve for x
    x = 145,235,221.31/13,668.10
  6. Step 6: Final answer
    x = 10,625.85

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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.