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Finding the Fourth Proportional to 13,213.69, 18,235.44 and 7,245.59

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Solution

The fourth proportional to 13,213.69, 18,235.44 and 7,245.59 is: 9,999.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,213.69 : 18,235.44 = 7,245.59 : x
  2. Step 2: Convert to fraction form
    13,213.69/18,235.44 = 7,245.59/x
  3. Step 3: Cross multiply
    13,213.69x = 18,235.44 × 7,245.59
  4. Step 4: Simplify right side
    13,213.69x = 132,126,430.53
  5. Step 5: Solve for x
    x = 132,126,430.53/13,213.69
  6. Step 6: Final answer
    x = 9,999.21

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Half scale
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Double 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.