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Finding the Fourth Proportional to 18,210.17, 25,141.62 and 13,190.99

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Solution

The fourth proportional to 18,210.17, 25,141.62 and 13,190.99 is: 18,211.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,210.17 : 25,141.62 = 13,190.99 : x
  2. Step 2: Convert to fraction form
    18,210.17/25,141.62 = 13,190.99/x
  3. Step 3: Cross multiply
    18,210.17x = 25,141.62 × 13,190.99
  4. Step 4: Simplify right side
    18,210.17x = 331,642,858.00
  5. Step 5: Solve for x
    x = 331,642,858.00/18,210.17
  6. Step 6: Final answer
    x = 18,211.96

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Half scale
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Double scale
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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.