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Finding the Fourth Proportional to 13,599.69, 18,768.88 and 8,299.86

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Solution

The fourth proportional to 13,599.69, 18,768.88 and 8,299.86 is: 11,454.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,599.69 : 18,768.88 = 8,299.86 : x
  2. Step 2: Convert to fraction form
    13,599.69/18,768.88 = 8,299.86/x
  3. Step 3: Cross multiply
    13,599.69x = 18,768.88 × 8,299.86
  4. Step 4: Simplify right side
    13,599.69x = 155,779,076.36
  5. Step 5: Solve for x
    x = 155,779,076.36/13,599.69
  6. Step 6: Final answer
    x = 11,454.60

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Half scale
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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.