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Finding the Fourth Proportional to 13,236.76, 18,136.01 and 13,072.78

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Solution

The fourth proportional to 13,236.76, 18,136.01 and 13,072.78 is: 17,911.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,236.76 : 18,136.01 = 13,072.78 : x
  2. Step 2: Convert to fraction form
    13,236.76/18,136.01 = 13,072.78/x
  3. Step 3: Cross multiply
    13,236.76x = 18,136.01 × 13,072.78
  4. Step 4: Simplify right side
    13,236.76x = 237,088,068.81
  5. Step 5: Solve for x
    x = 237,088,068.81/13,236.76
  6. Step 6: Final answer
    x = 17,911.34

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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 (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.