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Finding the Fourth Proportional to 13,104.69, 18,084.80 and 7,136.69

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Solution

The fourth proportional to 13,104.69, 18,084.80 and 7,136.69 is: 9,848.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,104.69 : 18,084.80 = 7,136.69 : x
  2. Step 2: Convert to fraction form
    13,104.69/18,084.80 = 7,136.69/x
  3. Step 3: Cross multiply
    13,104.69x = 18,084.80 × 7,136.69
  4. Step 4: Simplify right side
    13,104.69x = 129,065,611.31
  5. Step 5: Solve for x
    x = 129,065,611.31/13,104.69
  6. Step 6: Final answer
    x = 9,848.81

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Half scale
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Double scale
Find fourth proportional to 13,105.69, 18,086.18 and 7,137.69
Similar ratio
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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.