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Finding the Fourth Proportional to 13,667.76, 18,861.93 and 7,699.68

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Solution

The fourth proportional to 13,667.76, 18,861.93 and 7,699.68 is: 10,625.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,667.76 : 18,861.93 = 7,699.68 : x
  2. Step 2: Convert to fraction form
    13,667.76/18,861.93 = 7,699.68/x
  3. Step 3: Cross multiply
    13,667.76x = 18,861.93 × 7,699.68
  4. Step 4: Simplify right side
    13,667.76x = 145,230,825.18
  5. Step 5: Solve for x
    x = 145,230,825.18/13,667.76
  6. Step 6: Final answer
    x = 10,625.80

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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.